In JavaScript, arrays come with several methods to manipulate their elements, including Push(), Pop(), Unshift(), and Shift().

1. Push() Method

   • Purpose: Adds one or more elements to the end of an array.
   • Returns: The new length of the array.
   • Example: let arr = [1, 2, 3]; arr.push(4); output: [1,2,3,4];

2. Pop() Method

   • Purpose: Removes the last element from an array.
   • Returns: The removed element.
   • Example: let arr = [1, 2, 3, 4] let lastElement = arr.pop(); output: [1,2,3];

3. Unshift() Method

   • Purpose: Adds one or more elements to the beginning of an array.
   • Returns: The new length of the array.
   • Example: let arr = [2, 3, 4]; arr.unshift(1); output: [1,2,3,4];

4. Shift() Method

   • Purpose: Removes the first element from an array.
   • Returns: The removed element.
   • Example: let arr = [1, 2, 3, 4]; let firstElement = arr.shift(); output: [2,3,4];