If you write another program with a triangle in it, you can just copy and paste your triangle code wholesale! That is how to define a function in Python and call it! The function here is called ...

This is an easy way to be able to call multiple functions from the same Python file from the command line ... but I think this is cleaner and doesn't require any change to code inside your functions.

Great job, you've just nested a function within another function. One other pretty cool reason ... you will complete the definition of the inner function inner_echo() and # then call echo() a couple ...