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

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 takes a number and checks to see if it is greater than ten would look like this

def greaterThanTen(number):
  if number > 10:
    return True
  else:
    return False

And this would produce output like:

>>> greaterThanTen(20)
True
>>> greaterThanTen(-10)
False
>>> greaterThanTen(10)
False

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