What is JavaScript Operators?

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

What is an Operator?

An operator in JavaScript, is a symbol that is used to perform any assigned particular operation to operands (values and variables). For example,

let x = 10;

let y = 20;

document.write(x + y);

output:-

30

Here + is an operator that performs addition, and x and y 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
• String Operators
• Other Operators

JavaScript Assignment Operators

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

let x = 10;

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

Here’s a list of commonly used assignment operators:

Operator	Name	Example
“=”	Assignment operator	a = 7; // 7
“=+”	Addition assignment	a += 5; // a = a + 5
“-+”	Subtraction Assignment	a -= 2; // a = a – 2
“*=”	Multiplication Assignment	a *= 3; // a = a * 3
“/=”	Division Assignment	a /= 2; // a = a / 2
“%=”	Remainder Assignment	a %= 2; // a = a % 2
“**=”	Exponentiation Assignment

JavaScript Arithmetic Operators

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

const number = 10 + 20; // 30

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

Operator	Name	Example
“+“	Addition	x + y
“–“	Subtraction	x – y
“*“	Multiplication	x * y
“/“	Division	x / y
“%“	Remainder	x % y
“++“	Increment (increments by 1)	++x or x++
“—“	Decrement (decrements by 1)	–x or x–
“**“	Exponentiation (Power)	x ** y

JavaScript Comparison Operators

Comparison operators compare two values and return a boolean value, either true or false. Comparison operators are used in decision-making and loops. 

For example,

const a = 5, b = 4;
console.log(a > b); // true

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

Operator	Name	Example
“==“	Equal to: returns true if the operands are equal	x == y
“!=“	Not equal to: returns true if the operands are not equal	x != y
“===“	Strict equal to: true if the operands are equal and of the same type	x === y
“!==“	Strict not equal to: true if the operands are equal but of different type or not equal at all	x !== y
“>“	Greater than: true if left operand is greater than the right operand	x  > y
“>=“	Greater than or equal to: true if left operand is greater than or equal to the right operand	x >= y
“<“	Less than: true if the left operand is less than the right operand	x < y
“<=“	Less than or equal to: true if the left operand is less than or equal to the right operand	x <= y

Example of Comparision Operator

JavaScript Logical Operators

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

Logical operators are used in decision making and loops. 

For example,

const x = 8, y = 9;

(x < 10) && (y < 20); // true

Here, && is the logical operator AND. Since both x < 10 and y < 20 are true, the result is true.

Operator	Description	Example
“&&“	Logical AND: true if both the operands are true, else returns false	x && y
“||“	Logical OR: true if either of the operands is true; returns false if both are false	x || y
“ ! “	Logical NOT: true if the operand is false and vice-versa.	!x

Example of Logical Operators in JavaScript

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

Example of String operators in JavaScript

Output:-

JavaScript is Awesome

Other JavaScript Operators
Here’s a list of other operators available in JavaScript. All this Operator is used as per requirment.

Operator	Name	Example
“,“	Evaluates multiple operands and returns the value of the last operand	let a = (1, 3 , 4); // 4
“?:“	Returns value based on the condition	(5 > 3) ? ‘success’ : ‘error’; // “success”
“delete“	Deletes an object’s property, or an element of an array	delete x
“typeof“	Returns a string indicating the data type	typeof 3; // “number”
“void“	Discards the expression’s return value	void(x)
“in“	Returns true if the specified property is in the object	prop in object
“instanceof“	Returns true if the specified object is of of the specified object type	instanceof object_type

Thats all for now, i hope you like this particular blog on JavaScript Opertors.

Thank You !!!