Question: I have this very simple Python function, but there is one part I am confused about. The function is called bigger and it takes two numbers as inputs and outputs the bigger number. (I could only use if statements, no elses)

Here's the code:

```
def bigger(x, y):
    if x > y:
        return x
    return y

```

I would think that this code would return `y` if `y` is bigger (which it does), but it would return `x` and `y` if `x` is bigger (it only returns `x`). Why does it only return one output? Can Python functions only have one output?

Answer: 
The `return` statement not only returns a value, but also terminates the current function and returns control to the calling function. So, this function will only return a single value. In my opinion it would be slightly more clear to write this:

```
def bigger(x, y):
    if x > y:
        return x
    else:
        return y

```

but the result would not differ.
Python functions only returns one value.

You can try,

```
def bigger(x, y):

    #this is optional: value = None
    if x > y:
        value = x
    else:
        value = y
    return value

```