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.

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. You can think of a loop as a computerized version of the game where you tell someone to take X steps in one direction, then Y steps in another.

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++)

JavaScript for loop Syntax. The syntax of the for loop is: for (initialExpression; condition; updateExpression) { // for loop body } Here, initialExpression - Initializes a counter variable. condition - The condition to be evaluated. If true, the body of the for loop is executed. updateExpression - Updates the value of initialExpression.

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.

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 · The for loop is an iterative statement which you use to check for certain conditions and then repeatedly execute a block of code as long as those conditions are met. Flowchart for the for loop Syntax of a for loop

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.

While Loop. A while loop is best to use when you don't know how many times the code should run.. The while loop is the most intuitive loop type because it resembles many things we do in our every day life:. Keep walking (taking new steps) until you reach your destination. As long as the pot is dirty, continue washing it. Keep filling the tank of the car until it is full.

Feb 24, 2025 · In JavaScript, a for loop allows you to repeat a block of code again and again in your program. It’s like checking every item in the list or repeating any task multiple times. In this blog, we will discuss what JavaScript for loop is, how it works, and how you can use it in your code. Table of Content. What is JavaScript For Loop?