In this article we will learn how to reverse an array in JavaScript. There's more than one way to do this: Using method (Built In) reverse() Using for loop There are two ways, the first is easy because there's a built-in function in JavaScript that does this, and the second is to create that function with ourselves. It is better for you in the production stage to use what is in the language, but in the learning stage it is better to understand what is happening behind the scenes. Our Problem Now what is our problem? The problem is that there's an array and we want to reverse it. Imagine that there is a array like that: [1, 2, 3, 4, 5] And we want to reverse it to be like this [5, 4, 3, 2, 1] As we said earlier, we can solve the problem in two ways. Using method (Built In) reverse() Using for loop Using method (Built In) reverse() We can use method to solve our problem. reverse() **Example // Array let myArray = [1, 2, 3, 4, 5]; // Reverse the array let reversedArr = myArray.reverse(); // Result: console.log(reversedArr); **Output [ 5, 4, 3, 2, 1 ] Using for loop Now, before writing the code, we must understand how we will solve this problem by for loop? First, iteration using for iterate over every element in the array, right? Well here it means that we (the opposite) can start from the last element in the array to the first element Then we can add each element to a new array. Summarize the solution as follows: Iterate over every element in our array Iteration will start from the last to the first 5, 4, 3, 2, 1 Add each element to a new array. **Full code // Array let myArray = [1, 2, 3, 4, 5]; // Create new array let result = []; // Iterate over every element in our array for (let i = myArray.length - 1; i >= 0; i--) { // Add every element to new array result.push(myArray[i]); } // Result: console.log(result); **Output [ 5, 4, 3, 2, 1 ] Hope this helps. Cheers! Also published . here
