For this lesson, you need to do the following things on your Post:
1. Give your new post the same title as this one
2. Explain what a sub-routine is and why it is useful (think of at least 2 ways in which it is useful).
3. Explain how using sub-routines in a program for a computer to sing 'Old MacDonald had a farm' is useful and how it shortens the program.
4. What parts of the song did you put into sub-routines?
5. How many sub-routines and process boxes did you end up with in your final program?
When you've done that, click Publish! :-)
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