Home » JavaScript Tutorial » JavaScript Assignment Operators

JavaScript Assignment Operators

Summary : in this tutorial, you will learn how to use JavaScript assignment operators to assign a value to a variable.

Introduction to JavaScript assignment operators

An assignment operator ( = ) assigns a value to a variable. The syntax of the assignment operator is as follows:

In this syntax, JavaScript evaluates the expression b first and assigns the result to the variable a .

The following example declares the counter variable and initializes its value to zero:

The following example increases the counter variable by one and assigns the result to the counter variable:

When evaluating the second statement, JavaScript evaluates the expression on the right-hand first ( counter + 1 ) and assigns the result to the counter variable. After the second assignment, the counter variable is 1 .

To make the code more concise, you can use the += operator like this:

In this syntax, you don’t have to repeat the counter variable twice in the assignment.

The following table illustrates assignment operators that are shorthand for another operator and the assignment:

Chaining JavaScript assignment operators

If you want to assign a single value to multiple variables, you can chain the assignment operators. For example:

In this example, JavaScript evaluates from right to left. Therefore, it does the following:

  • Use the assignment operator ( = ) to assign a value to a variable.
  • Chain the assignment operators if you want to assign a single value to multiple variables.
  • Skip to main content
  • Select language
  • Skip to search
  • Assignment operators

An assignment operator assigns a value to its left operand based on the value of its right operand.

The basic assignment operator is equal ( = ), which assigns the value of its right operand to its left operand. That is, x = y assigns the value of y to x . The other assignment operators are usually shorthand for standard operations, as shown in the following definitions and examples.

Simple assignment operator which assigns a value to a variable. The assignment operation evaluates to the assigned value. Chaining the assignment operator is possible in order to assign a single value to multiple variables. See the example.

Addition assignment

The addition assignment operator adds the value of the right operand to a variable and assigns the result to the variable. The types of the two operands determine the behavior of the addition assignment operator. Addition or concatenation is possible. See the addition operator for more details.

Subtraction assignment

The subtraction assignment operator subtracts the value of the right operand from a variable and assigns the result to the variable. See the subtraction operator for more details.

Multiplication assignment

The multiplication assignment operator multiplies a variable by the value of the right operand and assigns the result to the variable. See the multiplication operator for more details.

Division assignment

The division assignment operator divides a variable by the value of the right operand and assigns the result to the variable. See the division operator for more details.

Remainder assignment

The remainder assignment operator divides a variable by the value of the right operand and assigns the remainder to the variable. See the remainder operator for more details.

Exponentiation assignment

This is an experimental technology, part of the ECMAScript 2016 (ES7) proposal. Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future version of browsers as the spec changes.

The exponentiation assignment operator evaluates to the result of raising first operand to the power second operand. See the exponentiation operator for more details.

Left shift assignment

The left shift assignment operator moves the specified amount of bits to the left and assigns the result to the variable. See the left shift operator for more details.

Right shift assignment

The right shift assignment operator moves the specified amount of bits to the right and assigns the result to the variable. See the right shift operator for more details.

Unsigned right shift assignment

The unsigned right shift assignment operator moves the specified amount of bits to the right and assigns the result to the variable. See the unsigned right shift operator for more details.

Bitwise AND assignment

The bitwise AND assignment operator uses the binary representation of both operands, does a bitwise AND operation on them and assigns the result to the variable. See the bitwise AND operator for more details.

Bitwise XOR assignment

The bitwise XOR assignment operator uses the binary representation of both operands, does a bitwise XOR operation on them and assigns the result to the variable. See the bitwise XOR operator for more details.

Bitwise OR assignment

The bitwise OR assignment operator uses the binary representation of both operands, does a bitwise OR operation on them and assigns the result to the variable. See the bitwise OR operator for more details.

Left operand with another assignment operator

In unusual situations, the assignment operator (e.g. x += y ) is not identical to the meaning expression (here x = x + y ). When the left operand of an assignment operator itself contains an assignment operator, the left operand is evaluated only once. For example:

Specifications

Browser compatibility.

  • Arithmetic operators

Document Tags and Contributors

  • JavaScript basics
  • JavaScript first steps
  • JavaScript building blocks
  • Introducing JavaScript objects
  • Introduction
  • Grammar and types
  • Control flow and error handling
  • Loops and iteration
  • Expressions and operators
  • Numbers and dates
  • Text formatting
  • Regular expressions
  • Indexed collections
  • Keyed collections
  • Working with objects
  • Details of the object model
  • Iterators and generators
  • Meta programming
  • A re-introduction to JavaScript
  • JavaScript data structures
  • Equality comparisons and sameness
  • Inheritance and the prototype chain
  • Strict mode
  • JavaScript typed arrays
  • Memory Management
  • Concurrency model and Event Loop
  • References:
  • ArrayBuffer
  • AsyncFunction
  • Float32Array
  • Float64Array
  • GeneratorFunction
  • InternalError
  • Intl.Collator
  • Intl.DateTimeFormat
  • Intl.NumberFormat
  • ParallelArray
  • ReferenceError
  • SIMD.Bool16x8
  • SIMD.Bool32x4
  • SIMD.Bool64x2
  • SIMD.Bool8x16
  • SIMD.Float32x4
  • SIMD.Float64x2
  • SIMD.Int16x8
  • SIMD.Int32x4
  • SIMD.Int8x16
  • SIMD.Uint16x8
  • SIMD.Uint32x4
  • SIMD.Uint8x16
  • SharedArrayBuffer
  • StopIteration
  • SyntaxError
  • Uint16Array
  • Uint32Array
  • Uint8ClampedArray
  • WebAssembly
  • decodeURI()
  • decodeURIComponent()
  • encodeURI()
  • encodeURIComponent()
  • parseFloat()
  • Array comprehensions
  • Bitwise operators
  • Comma operator
  • Comparison operators
  • Conditional (ternary) Operator
  • Destructuring assignment
  • Expression closures
  • Generator comprehensions
  • Grouping operator
  • Legacy generator function expression
  • Logical Operators
  • Object initializer
  • Operator precedence
  • Property accessors
  • Spread syntax
  • async function expression
  • class expression
  • delete operator
  • function expression
  • function* expression
  • in operator
  • new operator
  • void operator
  • Legacy generator function
  • async function
  • for each...in
  • function declaration
  • try...catch
  • Arguments object
  • Arrow functions
  • Default parameters
  • Method definitions
  • Rest parameters
  • constructor
  • element loaded from a different domain for which you violated the same-origin policy.">Error: Permission denied to access property "x"
  • InternalError: too much recursion
  • RangeError: argument is not a valid code point
  • RangeError: invalid array length
  • RangeError: invalid date
  • RangeError: precision is out of range
  • RangeError: radix must be an integer
  • RangeError: repeat count must be less than infinity
  • RangeError: repeat count must be non-negative
  • ReferenceError: "x" is not defined
  • ReferenceError: assignment to undeclared variable "x"
  • ReferenceError: deprecated caller or arguments usage
  • ReferenceError: invalid assignment left-hand side
  • ReferenceError: reference to undefined property "x"
  • SyntaxError: "0"-prefixed octal literals and octal escape seq. are deprecated
  • SyntaxError: "use strict" not allowed in function with non-simple parameters
  • SyntaxError: "x" is a reserved identifier
  • SyntaxError: JSON.parse: bad parsing
  • SyntaxError: Malformed formal parameter
  • SyntaxError: Unexpected token
  • SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead
  • SyntaxError: a declaration in the head of a for-of loop can't have an initializer
  • SyntaxError: applying the 'delete' operator to an unqualified name is deprecated
  • SyntaxError: for-in loop head declarations may not have initializers
  • SyntaxError: function statement requires a name
  • SyntaxError: identifier starts immediately after numeric literal
  • SyntaxError: illegal character
  • SyntaxError: invalid regular expression flag "x"
  • SyntaxError: missing ) after argument list
  • SyntaxError: missing ) after condition
  • SyntaxError: missing : after property id
  • SyntaxError: missing ; before statement
  • SyntaxError: missing = in const declaration
  • SyntaxError: missing ] after element list
  • SyntaxError: missing formal parameter
  • SyntaxError: missing name after . operator
  • SyntaxError: missing variable name
  • SyntaxError: missing } after function body
  • SyntaxError: missing } after property list
  • SyntaxError: redeclaration of formal parameter "x"
  • SyntaxError: return not in function
  • SyntaxError: test for equality (==) mistyped as assignment (=)?
  • SyntaxError: unterminated string literal
  • TypeError: "x" has no properties
  • TypeError: "x" is (not) "y"
  • TypeError: "x" is not a constructor
  • TypeError: "x" is not a function
  • TypeError: "x" is not a non-null object
  • TypeError: "x" is read-only
  • TypeError: More arguments needed
  • TypeError: can't access dead object
  • TypeError: can't define property "x": "obj" is not extensible
  • TypeError: can't redefine non-configurable property "x"
  • TypeError: cyclic object value
  • TypeError: invalid 'in' operand "x"
  • TypeError: invalid Array.prototype.sort argument
  • TypeError: invalid arguments
  • TypeError: invalid assignment to const "x"
  • TypeError: property "x" is non-configurable and can't be deleted
  • TypeError: setting getter-only property "x"
  • TypeError: variable "x" redeclares argument
  • URIError: malformed URI sequence
  • Warning: -file- is being assigned a //# sourceMappingURL, but already has one
  • Warning: 08/09 is not a legal ECMA-262 octal constant
  • Warning: Date.prototype.toLocaleFormat is deprecated
  • Warning: JavaScript 1.6's for-each-in loops are deprecated
  • Warning: String.x is deprecated; use String.prototype.x instead
  • Warning: expression closures are deprecated
  • Warning: unreachable code after return statement
  • JavaScript technologies overview
  • Lexical grammar
  • Enumerability and ownership of properties
  • Iteration protocols
  • Transitioning to strict mode
  • Template literals
  • Deprecated features
  • ECMAScript 2015 support in Mozilla
  • ECMAScript 5 support in Mozilla
  • ECMAScript Next support in Mozilla
  • Firefox JavaScript changelog
  • New in JavaScript 1.1
  • New in JavaScript 1.2
  • New in JavaScript 1.3
  • New in JavaScript 1.4
  • New in JavaScript 1.5
  • New in JavaScript 1.6
  • New in JavaScript 1.7
  • New in JavaScript 1.8
  • New in JavaScript 1.8.1
  • New in JavaScript 1.8.5
  • Documentation:
  • All pages index
  • Methods index
  • Properties index
  • Pages tagged "JavaScript"
  • JavaScript doc status
  • The MDN project

TutorialsTonight Logo

JAVASCRIPT ASSIGNMENT OPERATORS

In this tutorial, you will learn about all the different assignment operators in javascript and how to use them in javascript.

Assignment Operators

In javascript, there are 16 different assignment operators that are used to assign value to the variable. It is shorthand of other operators which is recommended to use.

The assignment operators are used to assign value based on the right operand to its left operand.

The left operand must be a variable while the right operand may be a variable, number, boolean, string, expression, object, or combination of any other.

One of the most basic assignment operators is equal = , which is used to directly assign a value.

javascript assignment operator

Assignment Operators List

Here is the list of all assignment operators in JavaScript:

In the following table if variable a is not defined then assume it to be 10.

Assignment operator

The assignment operator = is the simplest value assigning operator which assigns a given value to a variable.

The assignment operators support chaining, which means you can assign a single value in multiple variables in a single line.

Addition assignment operator

The addition assignment operator += is used to add the value of the right operand to the value of the left operand and assigns the result to the left operand.

On the basis of the data type of variable, the addition assignment operator may add or concatenate the variables.

Subtraction assignment operator

The subtraction assignment operator -= subtracts the value of the right operand from the value of the left operand and assigns the result to the left operand.

If the value can not be subtracted then it results in a NaN .

Multiplication assignment operator

The multiplication assignment operator *= assigns the result to the left operand after multiplying values of the left and right operand.

Division assignment operator

The division assignment operator /= divides the value of the left operand by the value of the right operand and assigns the result to the left operand.

Remainder assignment operator

The remainder assignment operator %= assigns the remainder to the left operand after dividing the value of the left operand by the value of the right operand.

Exponentiation assignment operator

The exponential assignment operator **= assigns the result of exponentiation to the left operand after exponentiating the value of the left operand by the value of the right operand.

Left shift assignment

The left shift assignment operator <<= assigns the result of the left shift to the left operand after shifting the value of the left operand by the value of the right operand.

Right shift assignment

The right shift assignment operator >>= assigns the result of the right shift to the left operand after shifting the value of the left operand by the value of the right operand.

Unsigned right shift assignment

The unsigned right shift assignment operator >>>= assigns the result of the unsigned right shift to the left operand after shifting the value of the left operand by the value of the right operand.

Bitwise AND assignment

The bitwise AND assignment operator &= assigns the result of bitwise AND to the left operand after ANDing the value of the left operand by the value of the right operand.

Bitwise OR assignment

The bitwise OR assignment operator |= assigns the result of bitwise OR to the left operand after ORing the value of left operand by the value of the right operand.

Bitwise XOR assignment

The bitwise XOR assignment operator ^= assigns the result of bitwise XOR to the left operand after XORing the value of the left operand by the value of the right operand.

Logical AND assignment

The logical AND assignment operator &&= assigns value to left operand only when it is truthy .

Note : A truthy value is a value that is considered true when encountered in a boolean context.

Logical OR assignment

The logical OR assignment operator ||= assigns value to left operand only when it is falsy .

Note : A falsy value is a value that is considered false when encountered in a boolean context.

Logical nullish assignment

The logical nullish assignment operator ??= assigns value to left operand only when it is nullish ( null or undefined ).

JS Tutorial

Js versions, js functions, js html dom, js browser bom, js web apis, js vs jquery, js graphics, js examples, js references, javascript operators.

The Addition Operator + adds numbers:

The Assignment Operator = assigns a value to a variable.

Operators

JavaScript Assignment

The Assignment Operator ( = ) assigns a value to a variable:

Assignment Examples

Javascript addition.

The Addition Operator ( + ) adds numbers:

JavaScript Multiplication

The Multiplication Operator ( * ) multiplies numbers:

Multiplying

Types of javascript operators.

There are different types of JavaScript operators:

  • Arithmetic Operators
  • Assignment Operators
  • Comparison Operators
  • String Operators
  • Logical Operators
  • Bitwise Operators
  • Ternary Operators
  • Type Operators

JavaScript Arithmetic Operators

Arithmetic Operators are used to perform arithmetic on numbers:

Arithmetic Operators Example

Arithmetic operators are fully described in the JS Arithmetic chapter.

Advertisement

JavaScript Assignment Operators

Assignment operators assign values to JavaScript variables.

The Addition Assignment Operator ( += ) adds a value to a variable.

Assignment operators are fully described in the JS Assignment chapter.

JavaScript Comparison Operators

Comparison operators are fully described in the JS Comparisons chapter.

JavaScript String Comparison

All the comparison operators above can also be used on strings:

Note that strings are compared alphabetically:

JavaScript String Addition

The + can also be used to add (concatenate) strings:

The += assignment operator can also be used to add (concatenate) strings:

The result of text1 will be:

When used on strings, the + operator is called the concatenation operator.

Adding Strings and Numbers

Adding two numbers, will return the sum, but adding a number and a string will return a string:

The result of x , y , and z will be:

If you add a number and a string, the result will be a string!

JavaScript Logical Operators

Logical operators are fully described in the JS Comparisons chapter.

JavaScript Type Operators

Type operators are fully described in the JS Type Conversion chapter.

JavaScript Bitwise Operators

Bit operators work on 32 bits numbers.

The examples above uses 4 bits unsigned examples. But JavaScript uses 32-bit signed numbers. Because of this, in JavaScript, ~ 5 will not return 10. It will return -6. ~00000000000000000000000000000101 will return 11111111111111111111111111111010

Bitwise operators are fully described in the JS Bitwise chapter.

Test Yourself With Exercises

Multiply 10 with 5 , and alert the result.

Start the Exercise

Test Yourself with Exercises!

Exercise 1 »   Exercise 2 »   Exercise 3 »   Exercise 4 »   Exercise 5 »

Get Certified

COLOR PICKER

colorpicker

Report Error

If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:

[email protected]

Top Tutorials

Top references, top examples, get certified.

Popular Tutorials

Popular examples, reference materials, learn python interactively, js introduction.

  • Getting Started
  • JS Variables & Constants
  • JS console.log
  • JavaScript Data types

JavaScript Operators

  • JavaScript Comments
  • JS Type Conversions

JS Control Flow

  • JS Comparison Operators
  • JavaScript if else Statement
  • JavaScript for loop
  • JavaScript while loop
  • JavaScript break Statement
  • JavaScript continue Statement
  • JavaScript switch Statement

JS Functions

  • JavaScript Function
  • Variable Scope
  • JavaScript Hoisting
  • JavaScript Recursion
  • JavaScript Objects
  • JavaScript Methods & this
  • JavaScript Constructor
  • JavaScript Getter and Setter
  • JavaScript Prototype
  • JavaScript Array
  • JS Multidimensional Array
  • JavaScript String
  • JavaScript for...in loop
  • JavaScript Number
  • JavaScript Symbol

Exceptions and Modules

  • JavaScript try...catch...finally
  • JavaScript throw Statement
  • JavaScript Modules
  • JavaScript ES6
  • JavaScript Arrow Function
  • JavaScript Default Parameters
  • JavaScript Template Literals
  • JavaScript Spread Operator
  • JavaScript Map
  • JavaScript Set
  • Destructuring Assignment
  • JavaScript Classes
  • JavaScript Inheritance
  • JavaScript for...of
  • JavaScript Proxies

JavaScript Asynchronous

  • JavaScript setTimeout()
  • JavaScript CallBack Function
  • JavaScript Promise
  • Javascript async/await
  • JavaScript setInterval()

Miscellaneous

  • JavaScript JSON
  • JavaScript Date and Time
  • JavaScript Closure
  • JavaScript this
  • JavaScript use strict
  • Iterators and Iterables
  • JavaScript Generators
  • JavaScript Regular Expressions
  • JavaScript Browser Debugging
  • Uses of JavaScript

JavaScript Tutorials

JavaScript Comparison and Logical Operators

JavaScript Booleans

JavaScript Bitwise Operators

JavaScript Ternary Operator

  • JavaScript if...else Statement
  • JavaScript typeof Operator
  • What is an Operator?

In JavaScript, an operator is a special symbol used to perform operations on operands (values and variables ). For example,

Here + is an operator that performs addition, and 2 and 3 are operands.

  • JavaScript Operator Types

Here is a list of different operators you will learn in this tutorial.

  • Assignment Operators
  • Arithmetic Operators
  • Comparison Operators
  • Logical Operators
  • Bitwise Operators
  • String Operators
  • Other Operators
  • JavaScript Assignment Operators

Assignment operators are used to assign values to variables. For example,

Here, the = operator is used to assign value 5 to variable x .

Here's a list of commonly used assignment operators:

Note: The commonly used assignment operator is = . You will understand other assignment operators such as += , -= , *= etc. once we learn arithmetic operators.

  • JavaScript Arithmetic Operators

Arithmetic operators are used to perform arithmetic calculations . For example,

Here, the + operator is used to add two operands.

Example 1: Arithmetic operators in JavaScript

Visit ++ and -- operator to learn more.

Note : The ** operator was introduced in ECMAScript 2016 and some browsers may not support them. To learn more, visit JavaScript exponentiation browser support .

  • JavaScript Comparison Operators

Comparison operators compare two values and return a boolean value, either true or false . For example,

Here, the comparison operator > is used to compare whether a is greater than b .

Example 2: Comparison operators in JavaScript

Comparison operators are used in decision-making and loops.

Note: To learn more about comparison operators, visit JavaScript Comparison and Logical Operators

  • JavaScript Logical Operators

Logical operators perform logical operations and return a boolean value, either true or false . For example,

Here, && is the logical operator AND . Since both x < 6 and y < 5 are true , the result is true .

Example 3: Logical Operators in JavaScript

Logical operators are used in decision making and loops. You will learn about the use of logical operators in detail in later tutorials.

Bitwise operators perform operations on binary representations of numbers.

Bitwise operators are rarely used in everyday programming. If you are interested, visit JavaScript Bitwise Operators to learn more.

  • JavaScript String Operators

In JavaScript, you can also use the + operator to concatenate (join) two or more strings .

Example 4: String operators in JavaScript

Note: When + is used with strings, it performs concatenation. However, when + is used with numbers, it performs addition.

  • Other JavaScript Operators

Here's a list of other operators available in JavaScript. You will learn about these operators in later tutorials.

  • JavaScript typeof

Table of Contents

Video: javascript operators.

Sorry about that.

Related Tutorials

JavaScript Tutorial

  • DSA with JS - Self Paced
  • JS Tutorial
  • JS Exercise
  • JS Interview Questions
  • JS Operator
  • JS Projects
  • JS Cheat Sheet
  • JS Examples
  • JS Free JS Course
  • JS A to Z Guide
  • JS Formatter
  • JS Web Technology

Related Articles

  • Solve Coding Problems
  • JavaScript Unary Operators
  • Left Shift Assignment (<<=) Operator in JavaScript
  • JavaScript String Operators
  • JavaScript Throttling
  • Exponentiation Assignment(**=) Operator in JavaScript
  • JavaScript | DataView()
  • XOR(^) Bitwise Operator in JavaScript
  • Right Shift (>>) Bitwise Operator in JavaScript
  • Zero Fill Right Shift (>>>) Bitwise Operator in JavaScript
  • JavaScript Operators Reference
  • JavaScript Basics
  • Introduction to JavaScript
  • Difference Between Scope and Closures in JavaScript
  • JavaScript Requests
  • Exponentiation(**) Arithmetic Operator in JavaScript
  • JavaScript SyntaxError - A declaration in the head of a for-of loop can't have an initializer
  • JavaScript SyntaxError - Unexpected token
  • JavaScript SyntaxError - JSON.parse: bad parsing
  • JavaScript Break Statement

Right Shift Assignment(>>=) Operator in JavaScript

The Right Shift Assignment Operator is represented by “>>=”. This operator shifts the first operand to the right and assigns the result to the variable. It can also be explained as shifting the first operand to the right in a specified amount of bits which is the second operand integer and then assigning the result to the first operand. 

Where –

  • a is the first operand, and
  • b is the second operand.

Example 1: In this example, we will see the implementation of the right shift assignment.

Example 2: In this example, we will see assigning the right shift operator to the variable.

We have a complete list of Javascript Assignment Operators, Please check this article Javascript Assignment Operator .

Supported Browser:

Please Login to comment...

  • Web Technologies
  • ChatGPT vs LLaMA: Detailed Comparison [Latest 2024]
  • The Future of Virtual Presence: AI Avatars Set to Attend Meetings on Your Behalf
  • Mumbaikars Can Now Check City Development Status Through Metaverse
  • 10 Best ChatGPT Prompts for Lawyers 2024
  • Dev Scripter 2024 - Biggest Technical Writing Event By GeeksforGeeks

Improve your Coding Skills with Practice

 alt=

What kind of Experience do you want to share?

IMAGES

  1. JavaScript Assignment Operators

    set javascript assignment operator

  2. JavaScript Operators.

    set javascript assignment operator

  3. Assignment Operator in JavaScript

    set javascript assignment operator

  4. What is operator in javascript with example?

    set javascript assignment operator

  5. The new Logical Assignment Operators in JavaScript

    set javascript assignment operator

  6. Operators in the Javascript

    set javascript assignment operator

VIDEO

  1. Operators in JavaScript

  2. JavaScript Exponentiation Assignment #coding #javascript #tutorial #shorts

  3. JavaScript Destructuring & Rest Operator

  4. How to use -= in JavaScript (subtraction assignment operator) #coding #javascript #tutorial #shorts

  5. Week 3 Javascript Assignment

  6. Week 7 JavaScript Assignment

COMMENTS

  1. Assignment (=)

    The assignment ( =) operator is used to assign a value to a variable or property. The assignment expression itself has a value, which is the assigned value. This allows multiple assignments to be chained in order to assign a single value to multiple variables. Try it Syntax js x = y Parameters x

  2. JavaScript Assignment

    Assignment operators assign values to JavaScript variables. Shift Assignment Operators Bitwise Assignment Operators Logical Assignment Operators Note The Logical assignment operators are ES2020 . The = Operator The Simple Assignment Operator assigns a value to a variable. Simple Assignment Examples let x = 10; Try it Yourself » let x = 10 + y;

  3. Expressions and operators

    « Previous Next » This chapter describes JavaScript's expressions and operators, including assignment, comparison, arithmetic, bitwise, logical, string, ternary and more. At a high level, an expression is a valid unit of code that resolves to a value.

  4. JavaScript OR (||) variable assignment explanation

    Old question, but regarding PHP, there is a construct you can use: $f=$a or $f=$b or $f=$c; // etc. PHP has both the || operator and the or operator, which do the same job; however or is evaluated after assignment while || is evaluated before. This also give you the perlish style of $a=getSomething () or die ('oops'); - Manngo Oct 14, 2016 at 7:30

  5. JavaScript Assignment Operators

    The syntax of the assignment operator is as follows: let a = b; Code language: JavaScript (javascript) In this syntax, JavaScript evaluates the expression b first and assigns the result to the variable a. The following example declares the counter variable and initializes its value to zero: let counter = 0; Code language: JavaScript (javascript)

  6. Set

    Description Set objects are collections of values. A value in the set may only occur once; it is unique in the set's collection. You can iterate through the elements of a set in insertion order.

  7. Assignment operators

    The basic assignment operator is equal ( = ), which assigns the value of its right operand to its left operand. That is, x = y assigns the value of y to x. The other assignment operators are usually shorthand for standard operations, as shown in the following definitions and examples. Assignment

  8. JavaScript Assignment Operators

    JavaScript assignment operator is equal (=) which assigns the value of the right-hand operand to its left-hand operand. That is if a = b assigns the value of b to a. The simple assignment operator is used to assign a value to a variable. The assignment operation evaluates the assigned value.

  9. Javascript Assignment Operators (with Examples)

    In this tutorial, you will learn about all the different assignment operators in javascript and how to use them in javascript. Assignment Operators. In javascript, there are 16 different assignment operators that are used to assign value to the variable. It is shorthand of other operators which is recommended to use.

  10. JavaScript Operators

    Set Goal. Get personalized learning journey based on your current skills and goals ... The Assignment Operator = assigns a value to a variable. JavaScript Assignment. ... JavaScript Assignment Operators. Assignment operators assign values to JavaScript variables. The Addition Assignment Operator (+=) adds a value to a variable. Assignment. let ...

  11. JavaScript Operators (with Examples)

    const x = 5; Here, the = operator is used to assign value 5 to variable x. Here's a list of commonly used assignment operators: Note: The commonly used assignment operator is =. You will understand other assignment operators such as +=, -=, *= etc. once we learn arithmetic operators. JavaScript Arithmetic Operators

  12. Logical OR assignment (||=)

    The logical OR assignment ( ||=) operator only evaluates the right operand and assigns to the left if the left operand is falsy. Try it Syntax js x ||= y Description Logical OR assignment short-circuits, meaning that x ||= y is equivalent to x || (x = y), except that the expression x is only evaluated once.

  13. #9 JavaScript Assignment Operators

    🙂SUBSCRIBE - hit the bell 🔔and choose all: https://goo.gl/nYLZvzIn this lesson, we're going to learn all about JavaScript Assignment Operators. Assignment ...

  14. Javascript AND operator within assignment

    Basically, the Logical AND operator ( && ), will return the value of the second operand if the first is truthy, and it will return the value of the first operand if it is by itself falsy, for example: true && "foo"; // "foo". NaN && "anything"; // NaN. 0 && "anything"; // 0. Note that falsy values are those that coerce to false when used in ...

  15. Operator precedence

    Assignment operators are right-associative, so you can write: js a = b = 5; // same as writing a = (b = 5); with the expected result that a and b get the value 5. This is because the assignment operator returns the value that is assigned. First, b is set to 5.

  16. JavaScript Logical OR assignment (||=) Operator

    This operator is represented by x ||= y and it is called a logical OR assignment operator. If the value of x is falsy then the value of y will be assigned to x. When we divide it into two parts it becomes x || ( x = y ). It checks if x is true or false, if the value of x is falsy then it runs the ( x = y ) block and the value of y gets stored ...

  17. javascript

    2 Answers Sorted by: 18 document.cookie is a little magical, but depending on your browser constraints, you an use Object.defineProperty to define properties that have different get and set behavior. For example: var obj = {}; Object.defineProperty(obj, "data", { get: function() {return this.val; },

  18. Remainder Assignment(%=) Operator in Javascript

    The Remainder Assignment Operator in javascript is represented by "%=". This operator is used to divide the value of the variable by another operand and assign the remainder to the variable which is the first operand. This can be also explained as assigning the remainder to the first operand which is obtained by dividing the variable from ...

  19. JavaScript Logical AND assignment (&&=) Operator

    Courses. This operator is represented by x &&= y, and it is called the logical AND assignment operator. It assigns the value of y into x only if x is a truthy value. We use this operator x &&= y like this. Now break this expression into two parts, x && (x = y). If the value of x is true, then the statement (x = y) executes, and the value of y ...

  20. How do you use the ? : (conditional) operator in JavaScript?

    It's a little hard to google when all you have are symbols ;) The terms to use are "JavaScript conditional operator". If you see any more funny symbols in JavaScript, you should try looking up JavaScript's operators first: Mozilla Developer Center's list of operators. The one exception you're likely to encounter is the $ symbol.

  21. Right Shift Assignment(>>=) Operator in JavaScript

    The Right Shift Assignment Operator is represented by ">>=".This operator shifts the first operand to the right and assigns the result to the variable. It can also be explained as shifting the first operand to the right in a specified amount of bits which is the second operand integer and then assigning the result to the first operand.