Automate the Boring Stuff with Python, 2nd Edition

3FUNCTIONS

You’re already familiar with the print(), input(), and len() functions from the previous chapters. Python provides several built-in functions like these, but you can also write your own functions. A function is like a miniprogram within a program.

To better understand how functions work, let’s create one. Enter this program into the file editor and save it as helloFunc.py:

➊ def hello():     ➋ print('Howdy!')        print('Howdy!!!')        print('Hello there.') ➌ hello()    hello()    hello()

You can view the execution of this program at https://autbor.com/hellofunc/. The first line is a def statement ➊, which defines a function named ...