input: Write a function to print the first 10 cubes of natural numbers. 
  for i in range(1, 11): 
      print(i**3)
  
  assert print_first_10_cubes()=="1\n8\n27\n64\n125\n216\n343\n512\n729\n1000"
output: def print_first_10_cubes():
      for i in range(1, 11):
          print(i**3)