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Remove Last Element From Array JavaScript

Last Updated : Jul 1, 2023

Remove Last Element From Array JavaScript

In this tutorial we will show you the solution of remove last element from array JavaScript, an array is a collection of related data elements stored in contiguous memory addresses.

It is the simplest data structure, with each data element retrievable solely by its index number.

However, how does a programmer remove the last element from an array in javascript? A variety of methods exist for removing array items. We'll find out in this tutorial.

Step By Step Guide On Remove Last Element From Array Javascript :-

Method 1 - Using the array.prototype.splice() method.

Parameters :-

start - The index from which the array should be changed.

deleteCount (optional parameter) - An integer indicating how many entries in the array should be removed from the beginning.

item1, item2,... (optional parameter) - The elements to add to the array, starting at the beginning. Splice() will only remove elements from the array if no elements are specified.

It can be used to get rid of the last element in an array.

<!DOCTYPE html>
<html>
<head></head>
<body>
<script>
var array = [10,11,12,13,14,15,16];
array.splice(-1,1);
console.log(array);
//Output: 16
</script>
</body>
</html>
  1. This method is used to modify an array's items by removing or replacing them. It returns the deleted elements if any element is deleted. Otherwise, you'll get an empty array.

Method 2 - Using the array.prototype.pop() method.

<!DOCTYPE html>
<html>
<head></head>
<body>
<script>
var array = [10,11,12,13,14,15,16];
array.pop();
console.log(array)
//Output: 16
</script>
</body>
</html>
  1. The easiest method is to use the pop() function. It returns the deleted element after removing the last element from an array.

Method 3 - Using the array.prototype.slice() method.

The following are the arguments we passed to the slice method:

start index - a zero-based index from which extraction will begin.

end index - extract till this index, but not including it. A negative index of -1 indicates that the array should be traversed up to, but not including, the last entry.

<!DOCTYPE html>
<html>
<head></head>
<body>
<script>
var array = [10,11,12,13,14,15,16];
array = array.slice(0,-1);
console.log(array);
//Output: 16
</script>
</body>
</html>
  1. The slice() function makes a duplicate of the defined portion from start to finish (the end is not included). The array's indices are the start and stop values.

Method 4 - Using the array.prototype.filter() method.

<!DOCTYPE html>
<html>
<head></head>
<body>
<script>
var array = [10,11,12,13,14,15,16];
array = array.filter((element, index) => index < array.length - 1);
console.log(array);
//Output: 16
</script>
</body>
</html>
  1. The filter() method returns a modified array based on the function that was sent in.
  2. See the code for how to use this function to remove the last element.

Method 5 - Using a user-defined method.

<!DOCTYPE html>
<html>
<head></head>
<body>
<script>
var array = [10,11,12,13,14,15,16,17];
function removeElement(arr) {
  if(arr.length > 0)
    arr.length --;
  return arr
};
var newArray = removeElement(array);
console.log(newArray);
 </script>
</body>
</html>
  1. If the length of the array is more than zero, we may write a new function that takes the array as an input and reduces the length of the array.
  2. This is demonstrated in the following example.

Conclusion :-

It's critical to manage your data by removing JavaScript Array items. Although there is no single'remove' function, you can purge unneeded array elements using a variety of ways and strategies.

I hope this tutorial on remove last element from array JavaScript helps you.