assignment operators supported by javascript

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Assignment operators assign values to JavaScript variables.

Shift Assignment Operators

Bitwise assignment operators, logical assignment operators, the = operator.

The Simple Assignment Operator assigns a value to a variable.

Simple Assignment Examples

The += operator.

The Addition Assignment Operator adds a value to a variable.

Addition Assignment Examples

The -= operator.

The Subtraction Assignment Operator subtracts a value from a variable.

Subtraction Assignment Example

The *= operator.

The Multiplication Assignment Operator multiplies a variable.

Multiplication Assignment Example

The **= operator.

The Exponentiation Assignment Operator raises a variable to the power of the operand.

Exponentiation Assignment Example

The /= operator.

The Division Assignment Operator divides a variable.

Division Assignment Example

The %= operator.

The Remainder Assignment Operator assigns a remainder to a variable.

The <<= Operator

The Left Shift Assignment Operator left shifts a variable.

Left Shift Assignment Example

The >>= operator.

The Right Shift Assignment Operator right shifts a variable (signed).

Right Shift Assignment Example

The >>>= operator.

The Unsigned Right Shift Assignment Operator right shifts a variable (unsigned).

Unsigned Right Shift Assignment Example

The &= operator.

The Bitwise AND Assignment Operator does a bitwise AND operation on two operands and assigns the result to the the variable.

Bitwise AND Assignment Example

The |= operator.

The Bitwise OR Assignment Operator does a bitwise OR operation on two operands and assigns the result to the variable.

Bitwise OR Assignment Example

The ^= operator.

The Bitwise XOR Assignment Operator does a bitwise XOR operation on two operands and assigns the result to the variable.

Bitwise XOR Assignment Example

The &&= operator.

The Logical AND assignment operator is used between two values.

If the first value is true, the second value is assigned.

Logical AND Assignment Example

The &&= operator is an ES2020 feature .

The ||= Operator

The Logical OR assignment operator is used between two values.

If the first value is false, the second value is assigned.

The ??= Operator

The Nullish coalescing assignment operator is used between two values.

If the first value is undefined or null, the second value is assigned.

Nullish Coalescing Assignment Example

The ??= operator is an ES2020 feature .

Test Yourself With Exercises

Use the correct assignment operator that will result in x being 15 (same as x = x + y ).

Start the Exercise

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Assignment (=)

The assignment ( = ) operator is used to assign 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.

Simple assignment and chaining

Value of assignment expressions.

The assignment expression itself evaluates to the value of the right-hand side, so you can log the value and assign to a variable at the same time.

Specifications

Browser compatibility.

BCD tables only load in the browser with JavaScript enabled. Enable JavaScript to view data.

Assignment operators in the JS guide
Destructuring assignment

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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. Chaining the assignment operator is possible in order to assign a single value to multiple variables. See the example.

Assignment Operators List: There are so many assignment operators as shown in the table with the description.

Below we have described each operators with a example code

Addition Assignment: This operator adds the value to 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. In case of concatenation then we use the string as an operand.

Subtraction Assignment: This operator subtracts the value of the right operand from a variable and assigns the result to the variable.

Multiplication Assignment: This operator multiplies a variable by the value of the right operand and assigns the result to the variable.

Division Assignment: This operator divides a variable by the value of the right operand and assigns the result to the variable.

Remainder Assignment : This operator divides a variable by the value of the right operand and assigns the remainder to the variable.

Exponentiation Assignment: This operator raises the value of a variable to the power of the right operand.

Left Shift Assignment: This operator moves the specified amount of bits to the left and assigns the result to the variable.

Right Shift Assignment: This operator moves the specified amount of bits to the right and assigns the result to the variable.

Bitwise AND Assignment: This operator uses the binary representation of both operands, does a bitwise AND operation on them, and assigns the result to the variable.

Bitwise OR Assignment: This operator uses the binary representation of both operands, does a bitwise OR operation on them, and assigns the result to the variable.

Bitwise XOR Assignment: This operator uses the binary representation of both operands, does a bitwise XOR operation on them, and assigns the result to the variable.

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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.

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In this tutorial, you will learn about different operators available in JavaScript and how to use them with the help of examples.

Video: JavaScript Operators

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 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. You will learn about the use of comparison operators in detail in later tutorials.

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.

Sorry about that.

JAVASCRIPT ASSIGNMENT OPERATORS

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