variable is not defined

[hentera]

It keeps telling me variable "number" is not defined, where am I going wrong? I'm trying to get my program to convert a number to a roman numeral. My I need the main function to use the information from the toRoman function. 

import sys

def toRoman(number):
    if number == 1:
        print (I)
    elif number == 2:
        print(II)
    elif number == 3:
        print(III)
    elif number == 4:
        print(IV)
    elif number == 5:
        print(V)
    elif number == 6:
        print(VI)
    elif number == 7:
        print(VII)
    elif number == 8:
        print(VIII)
    elif number == 9:
        print(IX)
    elif number == 10:
        print(X)
    return number

def main():
    try:
        number = int(input("Enter a Number: "))
    except:
        print("Sorry, please enter a number between 0-10")
        sys.exit()
 
print("Results: ", toRoman(number))

main()

[ichabod801]

Number is only defined in the two functions. It is not defined in the global scope. That is, if you define a variable in a function, it is not available outside the function.

If you put the print statement inside the main function (in the code block under the try statement), it will work.

[hentera]

Thanks for the help. I put the print statement under the try statement, when I run the program it automatically goes to the except statement. How can I get my main function to call on the toRoman function? I need the user to enter a number and have my program convert it to a roman numeral. Sorry for the newbie questions, I'm in an intro to programming class.

[sparkz_alot]

In addition, you need to specify the roman numeral as a string

from this:

    if number == 1:
        print(I)

to:

    if number == 1:
        print('I')    # Note the quotes

[hentera]

Thanks for the help! I figured out what I was doing wrong, I just have one more issue. When the user inputs the number to be converted to a roman numeral, when I run the program it looks like this.

Enter a Number: 3
Roman Numeral: III
3

What is causing the extra 3 to show up?

import sys

print("Integer to Roman Numeral Converter")
print()

def toRoman(number):
    if number < 0:
        sys.exit()
    elif number == 1:
        print('Roman Numeral: I')
    elif number == 2:
        print('Roman Numeral: II')
    elif number == 3:
        print('Roman Numeral: III')
    elif number == 4:
        print('Roman Numeral: IV')
    elif number == 5:
        print('Roman Numeral: V')
    elif number == 6:
        print('Roman Numeral: VI')
    elif number == 7:
        print('Roman Numeral: VII')
    elif number == 8:
        print('Roman Numeral: VIII')
    elif number == 9:
        print('Roman Numeral: IX')
    elif number == 10:
        print('Roman Numeral: X')
    elif number >= 11:
        sys.exit()
    return number

def main():
    try:
        number = int(input("Enter a Number: "))
        print(toRoman(number))
    except:
        print("Sorry, please enter a number between 0-10")

main()

[metulburr]

What is causing the extra 3 to show up?

dont print this. You are printing the return value of toRoman function

print(toRoman(number))

[volcano63]

You are printing converted value within your toRoman function - non-Pythonic name! - and return the value, which is printed in the main

        print(toRoman(number))

[hentera]

I'm kind of lost.. When I erase the print(toRoman(numbers)), the input option to "Enter a Number" shows up but It wont print the roman numeral.

[volcano63]

You have to call the function - you don't have to print the result of its execution. You removed the call - required - together with the wrapping print - parasitic (in your case)

[hentera]

How do I call the function? This is driving me nuts >_<!