input: Write a python function to check if an integer is present in a list.
  assert check_for_int([2, 4, 6], 4) == True
  assert check_for_int([2, 4, 6], 5) == False
  assert check_for_int([1, 3, 5], 1) == True
  assert check_for_int([1, 3, 5], 2) == False
output: def check_for_int(lst, num):
      return num in lst