In order to get the most out of this tutorial, you should have some familiarity with creating, indexing, modifying, and looping through arrays, which you can review in the tutorial Understanding Arrays in JavaScript. In this tutorial, we will be focusing on iteration methods. These methods are closely associated with loops. There is a third class of array methods, known as iteration methods, which are methods that operate on every item in an array, one at a time. Methods that modify the original array are known as mutator methods, and methods that return a new value or representation are known as accessor methods. There are many useful built-in methods available for JavaScript developers to work with arrays. While it may look complicated to a new user, it is very simple.In JavaScript, the array data type consists of a list of elements. We will go over each of these expressions shortly.īefore we explain what each of these expressions does, let us look at the syntax for this loop. This loop has three expressions that allow you to control its behavior.
The for loop in JavaScript is quite powerful.
The advantage the for loop has over other loops, like the while loop, is that it allows you to increase a value on every loop easily. Within JavaScript, a for loop allows you to repeat code until a specified condition becomes false. If you are familiar with languages like C or PHP, you will quickly pick up for loops. For loops are a vital component of almost every programming language, and JavaScript is no exception.
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