input: Write a function to compute the cube of a given integer input and print the result. The function should take an integer as input, calculate its cube, and return the cube value. 
  assert calculate_cube(3) == 27
  assert calculate_cube(0) == 0
  assert calculate_cube(-2) == -8
  assert calculate_cube(5) == 125
  assert calculate_cube(1) == 1
output: def calculate_cube(n):
      return n ** 3