Array rotation

arrayRotation.js

/*
  Given an array, rotate the array to the right by k steps, where k is non-negative.

  Example 1:

  Input: nums = [1,2,3,4,5,6,7], k = 3
  Output: [5,6,7,1,2,3,4]
  Explanation:
  rotate 1 steps to the right: [7,1,2,3,4,5,6]
  rotate 2 steps to the right: [6,7,1,2,3,4,5]
  rotate 3 steps to the right: [5,6,7,1,2,3,4]

  Example 2:

  Input: nums = [-1,-100,3,99], k = 2
  Output: [3,99,-1,-100]
  Explanation: 
  rotate 1 steps to the right: [99,-1,-100,3]
  rotate 2 steps to the right: [3,99,-1,-100]


  Constraints:

  1 <= nums.length <= 105
  -231 <= nums[i] <= 231 - 1
  0 <= k <= 105
*/