Example 1: Add Element to Array Using unshift()
Output
[4, 1, 2, 3]
In the above program, the new element is added to the array variable using the unshift() method.
The unshift() method adds a new element at the beginning of an array.
Example 2: Add Element to Array Using splice()
Output
[4, 1, 2, 3]
In the above program, the splice() method is used to add a new element to an array.
In the splice() method,
- The first argument is the index of an array where you want to add an element.
- The second argument is the number of elements that you want to remove from the index element.
- The third argument is the element that you want to add to the array.
Example 3: Add Element to Array Using Spread Operator
Output
[4, 1, 2, 3]
In the above program, the spread operator ... is used to add a new element to the beginning of an array.
arr = [4, ...arr]; takes first element as 4 and the rest elements are taken from array.
Example 4: Add Element to Array Using concat()
Output
[4, 1, 2, 3]
In the above program, the concat() method is used to add a new element to an array.
The concat() method combines two arrays into one.