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Get Programming
book

Get Programming

by Ana Bell
April 2018
Beginner
456 pages
11h 20m
English
Manning Publications
Content preview from Get Programming

Lesson 21. Achieving modularity and abstraction with functions

After reading lesson 21, you’ll be able to

  • Write code that uses functions
  • Write functions with (zero or more) parameters
  • Write functions that (may or may not) return a specified value
  • Understand how variable values change in different function environments

In lesson 20, you saw that dividing larger tasks into modules can help you to think about problems. The process of breaking up the task leads to two important ideas: modularity and abstraction. Modularity is having smaller (more or less independent) problems to tackle, one by one. Abstraction is being able to think about the modules themselves at a higher level, without worrying about the details of implementing each. You already ...

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