JavaScript Operators- Tutorialpath

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JavaScript also includes operators like other languages. An operator performs some operation on a single or multiple operand (data value) and produces a result.

Basic Example:

7 + 4 is equal to 11. Here 7 and 4 are called operands and ‘+’ is called the operator. JavaScript supports the following types of operators.

  • Arithmetic Operators
  • Comparison Operators
  • Logical (or Relational) Operators
  • Assignment Operators
  • Conditional (or ternary) Operators

Arithmetic Operator:

Arithmetic operators are used to perform mathematical work between numerical operations.

Assume variable A holds 10 and variable B holds 20, then −

Sl. No Operator & Description
1 + (Addition)

Adds two operands

Ex: A + B will give 30

2 – (Subtraction)

Subtracts the second operand from the first

Ex: A – B will give -10

3 * (Multiplication)

Multiply both operands

Ex: A * B will give 200

4 / (Division)

Divide the numerator by the denominator

Ex: B / A will give 2

5 % (Modulus)

Outputs the remainder of an integer division

Ex: B % A will give 0

6 ++ (Increment)

Increases an integer value by one

Ex: A++ will give 11

7 — (Decrement)

Decreases an integer value by one

Ex: A– will give 9

Assignment Operators

Assignment operators are used to assign values to JavaScript variables.

Given that x = 10 and y = 5, the table below explains the assignment operators:

Operator Example Same As Result in X
= x = y x = y x = 5
+= x + = y x = x + y x = 15
-= x  – = y x = x – y x = 5
*= x  * = y x = x * y x = 20
/= x  / = y x = x / y x = 2
%= x  % = y x = x % y x = 0

Comparison Operators

The JavaScript comparison operator compares the two operands. The comparison operators are as follows:

Operator Description Example
== Is equal to 10==20 = false
=== Identical (equal and of same type) 10==20 = false
!= Not equal to 10!=20 = true
!== Not Identical 20!==20 = false
> Greater than 20>10 = true
>= Greater than or equal to 20>=10 = true
< Less than 20<10 = false
<= Less than or equal to 20<=10 = false

Logical (or Relational) Operators

There are many types of Logical Operators in JavaScript –

Operator Description Example
&& (Logical AND) It checks if the two operations are non-zero (0, false, undefined, null or “” treated as zero), if yes, 1 otherwise return to 0. (10==20 && 20==33) = false
|| (Logical OR) It checks if either one is non-zero (0, false, undefined, null or “” is considered null). Thus || Returns true if either operand is true and if both are false it is false. (10==20 || 20==33) = false
! (Logical Not)

This reverses the Boolean result of the operand (or position).

!(10==20) = true

Conditional (or ternary) Operators

The conditional operator first evaluates an expression to a true or false value and then executes one of the two statements based on the result of the evaluation.

Sr.No. Operator and Description
1 ? : (Conditional )

If Condition is true? Then value X : Otherwise value Y



So, hopefully we have shared all the basic steps that help you JavaScript Operators.  In this tutorial, you have to learn basic several ways for JavaScript .

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