Arithmetic in JavaScript

Coding with JavaScript

🕑 This lesson will take about 10 minutes

In this lesson, you will learn how to use a range of arithmetic operators in JavaScript to assign values, modify variables and perform mathematical calculations.

If you have created your own variables and assigned them each a value (such as a string or integer), then you will already be familiar with the assignment operator which is a single = (equals sign).

Arithmetic operators include:

  • Addition +

  • Subtraction –

  • Division /

  • Multiplication *

  • Modulus %

  • Equals =

There are other arithmetic operators and functions (including exponentiation and square root) shown in the video and the sample code below.

The code below shows how you can use a range of operators when working with variable assignments and calculations.

Sample HTML & JavaScript code

Open the codepen snippet in a new tab/window and then click the Console button to view the output of the console.log() statements.

Next lesson: Strings