JavaScript Program to Insert Item in an Array

Example 1: Add Item to Array Using splice()

Output

[1, 2, 3, 8, 4, 5]

In the above program, the splice() method is used to insert an item with a specific index into an array.

The splice() method adds and/or removes an item.

In the splice() method,

• The first argument specifies the index where you want to insert an item.
• The second argument (here 0) specifies the number of items to remove.
• The third argument specifies the element that you want to add to an array.

Example 2: Add Item to Array Using for Loop

Output

[1, 2, 3, 8, 4]

In the above program,

• The for loop is used to iterate through the array elements.
• The element is added to the given index.
• All the elements whose index is greater than the given index are shifted one step to the right.