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JavaScript supports different kinds of loops: for - loops through a block of code a number of times. for/in - loops through the properties of an object. for/of - loops through the values of an iterable object. while - loops through a block of code while a specified condition is true.
Jun 3, 2024 · JavaScript loops are essential for efficiently handling repetitive tasks. They execute a block of code repeatedly as long as a specified condition remains true. These loops are powerful tools for automating tasks and streamlining your code.
Sep 12, 2023 · 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.
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.
The JavaScript for in statement loops through the properties of an Object: Syntax. for (key in object) { // code block to be executed. } Example. const person = {fname:"John", lname:"Doe", age:25}; let text = ""; for (let x in person) { text += person [x]; } Try it Yourself » Example Explained. The for in loop iterates over a person object.
Introduction to the JavaScript for loop statement. The for loop statement creates a loop with three optional expressions. The following illustrates the syntax of the for loop statement: for (initializer; condition; iterator) { // statements . } Code language: JavaScript (javascript) 1) initializer.
Jul 19, 2024 · Programming languages are very useful for rapidly completing repetitive tasks, from multiple basic calculations to just about any other situation where you've got a lot of similar items of work to complete. Here we'll look at the loop structures available in JavaScript that handle such needs.
