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.

Dec 26, 2024 · JavaScript for loop is a control flow statement that allows code to be executed repeatedly based on a condition. It consists of three parts: initialization, condition, and increment/decrement. [GFGTABS] javascript // for loop begins when x=2 // and runs till x <= 4 for (let x = 2; x <= 4; x++)

In JavaScript, the for loop is used for iterating over a block of code a certain number of times or over the elements of an array. In this tutorial, you will learn about the JavaScript for loop with the help of examples.

Apr 10, 2025 · Loops offer a quick and easy way to do something repeatedly. This chapter of the JavaScript Guide introduces the different iteration statements available to JavaScript.

This tutorial shows you how to use the JavaScript for loop to create a loop that executes a block of code repeatedly in a specific number of times.

May 27, 2022 · Loops are computer programs that execute a set of instructions or a block of code a certain number of times without having to write it again until a certain condition is met. In other words, loops let your code execute one or more statements as many times as desired.

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:

Loop (iterate over) an array to collect car names: The loop starts in position 0 (let i = 0). The loop automatically increments i for each run. The loop runs as long as i < cars.length. More examples below. The for statement defines a code block that is executed as long as a condition is true.

JavaScript now supports five different types of loops: while — loops through a block of code as long as the condition specified evaluates to true. do…while — loops through a block of code once; then the condition is evaluated. If the condition is true, the statement is repeated as long as the specified condition is true.

Here are some examples of when for loops come in handy: And much more! The keybenefit of a for loop is not having to rewrite the same code over and over. You define the loop once and let the counter variable keep track of each iteration. The basic syntax of a …