Comparing For and While. If you have read the previous chapter, about the for loop, you will discover that a while loop is much the same as a for loop, with statement 1 and statement 3 omitted. The loop in this example uses a for loop to collect the car names from the cars array:

Jun 19, 2022 · We covered 3 types of loops: while – The condition is checked before each iteration. do..while – The condition is checked after each iteration. for (;;) – The condition is checked before each iteration, additional settings available. To make an “infinite” loop, usually the while(true) construct is used.

Oct 11, 2016 · While-loop Syntax: while(!done) { //Some code goes here } I would use this loop when I am NOT SURE how many ITERATIONS I might need to carry out. Examples: Waiting for user to input correct input values and keep looping until he/she inputs the proper value. Do-While loop Syntax: do { //Some code here } while(!done);

Apr 19, 2024 · In JavaScript, both forEach and for loops are used to iterate over arrays or collections, but they differ in usage and behavior. forEach is a higher-order function that simplifies iteration with built-in array methods, while for loops offer …

JavaScript supports different kinds of loops: The for statement creates a loop with 3 optional expressions: Expression 1 is executed (one time) before the execution of the code block. Expression 2 defines the condition for executing the code block. Expression 3 is executed (every time) after the code block has been executed.

In JavaScript, there are currently two types of loop structures: The "for" loop and the "while" loop. They both come in several variations, and in this article we'll dig deeper into how they work and how you can use them.

for — loops through a block of code until the counter reaches a specified number. for…in — loops through the properties of an object. In the following sections, we will discuss each of these loop statements in detail. This is the simplest looping statement provided by JavaScript.

Mar 9, 2024 · There are mainly four types of loops in JavaScript. for loop; for/in a loop (explained later) while loop; do…while loop; for loop. Syntax: for(statement1; statement2; statment3) { lines of code to be executed } The statement1 is executed first even before executing the looping code.

Feb 15, 2020 · Loops are used in JavaScript to perform repeated tasks based on a condition. Conditions typically return true or false. A loop will continue running until the defined condition returns false. The for loop consists of three optional expressions, followed by a code block:

Jan 30, 2025 · In this article, I'll walk you through the main types of loops in JavaScript. We'll look at how each one works, when to use them, and how to choose the right one for your specific needs with examples based on real-world scenarios.