This lesson will help you review Python functions by providing some challenge exercises involving Strings.

As a refresher, function syntax looks like this:

def some_function(some_input1, some_input2):
  … do something with the inputs …
  return output

For example, a function that finds the difference in length between two Strings would look like this:

def lengthDiff(str1, str2):
  return len(str1) - len(str2)

And this would produce output like:

>>> lengthDiff("Python", "rocks")
1
>>> lengthDiff("Marco", "Polo")
1
>>> lengthDiff("Kevin", "Durant")
-1

When you’re ready to do this series of short function challenges, continue on to the rest of the lesson!