8.4.8: Sum Two Numbers

I added them. What's the issue?

There are two aspects of this that might cause an error.

First: Follow Naming Conventions

First, make sure that you are following the proper naming conventions for variables. I had a student once use capital X and Y - but that's not right! Proper conventions call for underscore_case, which uses lowercase variables (x and y).

I hear thoughts: "That doesn't matter!" But it does! When you're building a complicated program with multiple people coding, naming conventions quickly become super important. Learn them now so your future coworkers don't toilet paper your house.

Second: Don't Waste Lines

Second, return the value directly. If you have it coded like this:

def sum_two(x,y):
    sum = x + y
    return sum

you instead need it to skip the variable name on line 2. There is no need for it; you're just making your program unnecessarily longer. You can do the addition and the return on a single line.