#!/usr/bin/env python
 
# file: data/courses/ece_1111/current/quizzes/qu_02/pynkivskyi_oleg/p02
# 20230827 (JP): first version
#
# This is a Python program tha
# (1)	prints the program name to the terminal (stdout).
#(2)	accepts an integer argument from the command line.
#(3)	computes the factorial of the argument.
#(4)	prints the value to the terminal (stdout).



# import system modules
#
import os
import sys

#------------------------------------------------------------------------------
 #
# global variables are listed here
#
#------------------------------------------------------------------------------

#------------------------------------------------------------------------------
#
# functions are listed here
#
#------------------------------------------------------------------------------

# function: main
# 
def main(argv):

    # print program name for (1) arguments
    print("program name: %s" % (argv[0]))

     # Input: An integer number
    num = (sys.argv[1])

# Initialize the factorial variable to 1
    factorial = 1

# Calculate the factorial using a for loop
    for i in range(1, num + 1):
        factorial *= i
# Output: The factorial of the number
    print(f"The factorial of {num} is {factorial
    return True

# begin gracefully
#
if __name__ == '__main__':
    main(sys.argv[0:])