input: Write a function that takes any number of integer arguments and returns their sum.
  
  def sum_ints(*args):
      total = 0
      for num in args:
          total += num
      
      return total
  
  print(sum_ints(3, 5, 7)) == 15
  print(sum_ints(2, 4, 6, 8)) == 20
  print(sum_ints()) == 0
  print(sum_ints(-1, -2, 3)) == 0
output: def sum_ints(*args):
      total = 0
      for num in args:
          total += num
      
      return total