coderbyte-FirstFactorial.py

'''
Have the function FirstFactorial(num) take the num parameter being passed and return the factorial of it. For example: if num = 4, then your program should return (4 * 3 * 2 * 1) = 24. For the test cases, the range will be between 1 and 18 and the input will always be an integer. 

Use the Parameter Testing feature in the box below to test your code with different arguments.
'''

def FirstFactorial(num): 
    if num == 1:
        return 1
    else:
        return num * FirstFactorial(num - 1)

str = input()
print(FirstFactorial(str))