Indentation error in Python Program

Question

My code is -

def factorial(number):

result = 1

while number > 0:

result = result*number

number = number- 1

return result

in_variable = input("Enter a number to calculate the factorial of")

print factorial(in_variable)

I am getting an indentation error on line :

number = number- 1

My error is: Unexpected indent

Why is that?

Regards,

Nupur

Ironically, you stripped out all the indentation. Reproduce it accurately so that it can be investigated. — TigerhawkT3, Apr 16 '15 at 22:59
Can you post your code with the *actual formatting* you're using? As you're no doubt aware, in Python indentation matters. Don't forget that spaces and tabs cannot be mixed either. — Oliver W., Apr 16 '15 at 22:59

score 2 · Answer 1 · edited May 23 '17 at 11:57

The code you've posted shows no indentation at all. Remember, for Python, indentation matters.

After indenting your code, you are still facing two bugs:

you are using input, which means you are using Python3 OR you should have been using raw_input. See this discussion, which explains the difference very well. If you are using Python3, then it's not correct to use the print statement: you should be using the print function. If you're using Python2, you should be using raw_input.
Your function, factorial, expects a number, yet you are passing it a string (which is the return value of raw_input and input). Convert to int first.

This code is properly indented and works on Python3. Use raw_input rather than input if you're working with Python2.

def factorial(number):
    result = 1
    while number > 0:
        result = result*number
        number = number- 1
    return result

in_variable = input("Enter a number to calculate the factorial of")

print(factorial(int(in_variable)))

score 0 · Answer 2 · answered Apr 16 '15 at 23:11

def factorial(number):

    result = 1

    while number > 0:

       result = result * number

       number = number- 1

    return result
in_variable = int(input("Enter a number to calculate the factorial of"))

print(factorial(in_variable))

You need to convert the input from str to int.

score 0 · Answer 3 · answered Jul 31 '22 at 19:07

If you are not sure your indention str of int. You can easily check it with type(in_variable) and if it is str, you should change it to int with in_variable = int(input("Enter a number to calculate the factorial of"))

def factorial(number):
result = 1
while number > 0:
    result = result*number
    number = number- 1
return result

in_variable = input("Enter a number to calculate the factorial of")

Indentation error in Python Program

3 Answers3