can someone tell me what i have wrong in this program

Question

i think i have everything correct, but i'm not sure what the question means when it says return none.
```trial.py
def add(a, b):
    try:
        except ValueError:
            return None
        else:
            c =  float(a)+float(b)
            return c
add(1, 2)
```

Katie Wood · Answer

Hi there, 
The issue seems to be how the try-except is formatted.  Your 'try', 'except', and 'else' should all line up.  The challenge also asks that your 'try' block include the code to convert the values to floats.  This part is important, because the code in the 'try' block should be the code that could possibly throw an error.  
You have a couple of options to solve this - one is to separate the conversion from the addition, and place the return in the 'else' block by itself:
python
def add(a, b):
    try:
        float_a = float(a)
        float_b = float(b)
    except ValueError:
        return None
    else:
        return float_a + float_b

The other way is to just put the whole return statement in the 'try' block:
python
def add(a, b):
    try:
        return float(a) + float(b)
    except ValueError:
        return None

I tried both - both should pass the challenge.  Feel free to use whichever one you like better - hope this helps!

Welcome to the Treehouse Community

Looking to learn something new?

khabir baukman

khabir baukman

can someone tell me what i have wrong in this program

1 Answer

Katie Wood

Katie Wood