# Deleted

**pyronez**#3

you can't use sum as a variable, because it has another function

```
def digit_sum(n):
n = str(n)
summ = 0
for i in n:
i = int(i)
summ += i
return summ
```

also everytime you are defining the summ variable in your code, your making it 0 again, which is why in the end it becomes 4

**evanjelly**#4

you can try it.

```
def digit_sum(n):
sum = 0
for i in str(n):
sum = sum + int(i)
return sum
```

def digit_sum(n):

num = int(raw_input("Please enter a two digit number: ")

second = num%10 #if no. is 21, modulo gives 1

return second

first = num/10

return first

summ = 0

summ = first + second

return summ

print summ

I have considered only a two digit no., to start with but has threw up the following error:

File "python", line 3

second = num%10 #if no. is 21, modulo gives 1

^

SyntaxError: invalid syntax

and

Oops, try again. Did you create a function called digit_sum? Your code threw a "global name 'digit_sum' is not defined" error.

Could you let me know where m wrong.

**system**#7

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.