JavaScript Tutorial – Arithmetic Operators

JavaScript operators are used to assign values, compare values, perform arithmetic operations, and more.

JavaScript Assignment Operators

Operator = is an “assignment” operator, not an “equal to” operator. It assigns a value to its left operand based on the value of its right operand.


var website = "WhatAboutHTML";

In the above example, the left operand is a variable called website and the right operand is a string WhatAboutHTML.

JavaScript Arithmetic Operators

Arithmetic operators are used to perform arithmetic on numbers (literals or variables). Common arithmetic operators are addition: +, subtraction: -, multiplication: * and division: /. See examples below.

How to add numbers in JavaScript – Addition operator

		
var sum = 5+1;
document.write("5 + 1 = " + sum);

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How to subtract numbers in JavaScript – Subtraction operator

		
var difference = 5-1;
document.write("5 - 1 = " + difference);

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How to multiply numbers in JavaScript – Multiplication operator

		
var product = 5*2;
document.write("5 * 2 = " + product);

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How to divide numbers in JavaScript – Division operator

		
var num = 5/2;
document.write("5 / 2 = " + num);

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How to Concatenate Strings in JavaScript

The addition operator can also be used to concatenate strings. You can also concatenate string and number, but the result will be a string.

How to combine strings in JavaScript

		
var text = "This is " + "JS tutorial 
";
var text1 = "This is " + "JavaScript tutorial " + 2;
document.write(text); 
document.write(text1);

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