We saw our example a few lessons ago took a parameter number which was used in code in the function body. Let's declare a parameter again.

Nice! Here we want to return an int and double our argument. It makes sense that our parameter would be an int-type variable.

Make sure you declare a type and then the name of the variable.

Whoopsie! If we want to return an int and multiply our argument, what type do you think it should be?