input: Write a function to take any number of integer arguments and return their sum. If no arguments are provided, return 0.
  
  def sum_ints(*args):
      if not args:
          return 0
      total = 0
      for num in args:
          total += num
      
      return total
  
  assert sum_ints(3, 5, 7) == 15
  assert sum_ints(2, 4) == 6
  assert sum_ints(10) == 10
  assert sum_ints() == 0
  assert sum_ints(1, -1, 1) == 1
  assert sum_ints(-3, -5, -7) == -15
output: def sum_ints(*args):
      if not args:
          return 0
      total = 0
      for num in args:
          total += num
      
      return total