sorted array without sort

sort.js

*/
var sortedArrays = function (arr1, arr2) {
  let ans = new Array(arr1.length + arr2.length)
  let i = 0, j = 0, k = 0
  while (i < arr1.length && j < arr2.length) {
    if (arr1[i] < arr2[j])  {
      ans[k] = arr1[i]
      i++
    }
    else {
      ans[k] = arr2[j]
      j++
    }
    k++
  }

  while (i < arr1.length) {
    ans[k] = arr1[i]
    i++
    k++
  }
  while (j < arr2.length) {
    ans[k] = arr2[j]
    j++
    k++
  }
  return ans
}