/*I'm new to coding and now I want to get the sum of two arrays... Actually the sum of all their elements. I'll appreciate for your help.

P.S. Each array includes only integer numbers. Output is a number too.
*/
function arrayPlusArray(arr1, arr2) {
  return [...arr1, ...arr2].reduce((sum, element)=>{
    return sum+= element;
  }, 0)
}