function findMax(arr, max = -Infinity, i = 0) {
  if (i > arr.length-1) return max
  if (arr[i] > max) {
      max = arr[i]
    } 
  return findMax(arr,max, i +1)
}

function findMax(arr) {
  max = -Infinity

  for (i = 0; i<arr.length; i++){
    if (arr[i] > max) {
      max = arr[i]
    } 
  }
  return max
}

function findMax(arr) {
  max = -Infinity

  for (i = 0; i<arr.length; i++){
    if (Math.max(arr[i], max) > max) {
      max = arr[i]
    } 
  }
  return max
}