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JavaScript Array Reversal Tutorial

Welcome to this JavaScript tutorial on how to reverse an array. Reversing an array means changing the order of its elements so that the first element becomes the last and the last becomes the first.

Basic Method

The simplest way to reverse an array in JavaScript is to use the reverse method that comes built-in with every array. Here’s an example:

    
      
        var array = [1, 2, 3, 4, 5];
        array.reverse();
        console.log(array); // Output: [5, 4, 3, 2, 1]
      
    
  

As you can see, by calling the reverse method on the array variable, we were able to reverse its elements in place.

Manual Method

If you want to reverse an array without using the built-in method, you can do so by writing your own function. Here’s an example of a simple function that accomplishes this:

    
      
        function reverseArray(arr) {
          var reversed = [];
          for (var i = arr.length - 1; i >= 0; i--) {
            reversed.push(arr[i]);
          }
          return reversed;
        }

        var originalArray = [1, 2, 3, 4, 5];
        var reversedArray = reverseArray(originalArray);
        console.log(reversedArray); // Output: [5, 4, 3, 2, 1]
      
    
  

By calling the reverseArray function with the originalArray as the argument, we were able to get a new array with reversed elements.

Conclusion

Reversing an array in JavaScript is a common operation that can be accomplished using either the built-in reverse method or by writing a custom function. Hopefully, this tutorial has given you a better understanding of how to achieve this task in JavaScript.

Happy coding!