input: Write a function to calculate the cube of a given integer. The function should take an integer input from the user, compute its cube, and print the result.
  assert cube_of_number(3)=="The cube of the number is: 27"
  assert cube_of_number(4)=="The cube of the number is: 64"
  assert cube_of_number(5)=="The cube of the number is: 125"
  assert cube_of_number(1)=="The cube of the number is: 1"
  assert cube_of_number(0)=="The cube of the number is: 0"
output: def cube_of_number(n):
      return f"The cube of the number is: {n**3}"