12: Iteration in Python

Debug it

**Iteration in Python**: Make code repeat as many times as you want

Below is some code that has been deliberately broken so that you can fix it.

It’s supposed to give the following program output for the Old McDonald Had a Farm nursery rhyme:

Challenges

Change the mouse noise so that it eeks rather than moos

Hint: The order of the values in the lists on lines 2 and 3 is important
Add an empty line between each verse

Hint: Indentation controls which lines are repeated.
Change it so that it says the correct verse number rather than verse 1 each time

Line 5 creates a variable called i which is used in the for loop to count from 0 to the length of animals (0, 1 and 2). You can use this variable to display the verse numbers you want (1, 2 and 3)

Hint: remember to convert your integer to a string with str()

On the next page you’ll get some ideas for projects where you can use iteration to create your own projects

Page 1: Intro
Page 2: The theory: learn what you need to know as fast as possible.
Page 3: Try it: try out and adapt some working python code snippets.
Page 4: Debug it: Learn how to find and fix common mistakes.
Page 5: Extend it: Choose a project idea to use your newfound python skills.