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Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today. # Number guess game "reversed"

Hey treehouse friends,

I nee help understanding the variable concept inside python.

I have created a number game where the computer guesses the number of the user.

But it doesnt work ;((((

``` # -*- coding: utf-8 -*-

import random

# create a list to store the computer guesses
list = []

print("Input a number between 0 and 10")

# user input method
def input_number():
while True:
try:
num_to_guess = int(raw_input("> "))
break
except ValueError:
print("Something went wrong")

def game():
# let the computer gueess until the length of the list is 10
while len(list) <  10:
# create the random number
pc_num = random.randint(0, 10)
list.append(pc_num)
if pc_num == num_to_guess:
print("PC got it")
break

#call the method to get the number from the user
input_number()

# start the game
game()

#print the list
print(list)
```

The error is:

```Input a number between 0 and 10
> 6
Traceback (most recent call last):
File "reverse_guess_game.py", line 34, in <module>
game()
File "reverse_guess_game.py", line 26, in game
if pc_num == num_to_guess:
NameError: global name 'num_to_guess' is not defined
```

What is the meaning of the global name not defined?

Every help is highly appreciated.

Grigorij  try adding `num_to_guess = 0` up where you define list. That will make it global, and accessible by both functions.