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Lecture 17 · 30 min

Functions in Depth

Advantages of functions, library vs user-defined, the three components, parameter lists, and return statements.

Library vs user-definedDeclaration / definition / callParametersReturn
Slide 1 / 14

All the advantages of functions

  • Separation of concerns — separate *what* the program does from *how*
  • Readability — printReport() is clearer than 50 lines of printing code
  • Reusability — write once, call anywhere
  • Easier debugging — isolate and test one function at a time
  • Team collaboration — different team members write different functions
  • Modularity — break complex problems into smaller, manageable pieces
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