Loops in JavaScript

The Power of Loops: A Guide to Understanding JavaScript Loops

Photo by Dan Cristian Pădureț on Unsplash

Loops are an integral part of programming. Whether you’re a beginner dipping your toes into code or a seasoned developer, understanding loops can help you write cleaner, leaner JavaScript.

In this article, we’ll explore the iteration statements that allow you to perform repetitive actions efficiently in JS.

The Basics

Loops make it easy to do something over and over again — like print numbers from 1 to 10 or execute a block of code as long as a condition is true. They spare us from writing repetitive code. JavaScript has several loop constructs for different scenarios:

• for — Execute code a specific number of times
• while — Execute code while a condition is true
• do/while — Same as while, but code executes at least once
• forEach — Execute a function on each array element

Let’s unpack how these loops can supercharge your scripts!

For Loops: Precise Iteration

The for loop runs through a block of code a predetermined number of times. This works well when you know exactly how many iterations you need.