i have Error codes when running my python program

Question

I have this python script that calculates the factorial of number.

import math

def calculate_factorial(n):
    if n < 0:
        return 0
    elif n == 0:
        return 1
    else:
        return n * calculate_factorial(n - 1)

def main():
    n = input("Enter a number: ")
    factorial = calculate_factorial(n)
    print(f"The factorial of {n} is: {factorial}")

if ___name__ == "__main__":
    main()

the program should print the factorial of a number, but instead it give me errors:

NameError: name '___name__' is not defined

TypeError: '<' not supported between instances of 'str' and 'int'

When typing any number that i want to calculate the factorial of. Can you help me? thank!

Asked By: user ty1

||

Source

Answer 1

Welcome to StackOverflow! It seems that you have a typo in your code:

___name__

should be:

__name__

You also first need to convert the input to an integer using the int() function:

import math

def calculate_factorial(n):
    if n < 0:
        return 0
    elif n == 0:
        return 1
    else:
        return n * calculate_factorial(n - 1)

def main():
    n = int(input("Enter a number: "))
    factorial = calculate_factorial(n)
    print(f"The factorial of {n} is: {factorial}")

if __name__ == "__main__":
    main()

With all of those issues fixed, the program should now print the factorial of a number:

Enter a number: 13

The factorial of 13 is: 6227020800

I hope you find this response useful.

Answered By: Alon Alush

i have Error codes when running my python program

Question:

Answers: