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:A very simple definition of using '''functions''' is like having to create and reuse '''smaller programs contained inside within a larger program''' that can be run by '''function name''' to perform '''repeated or commonly routine tasks'''. In programming languages such as C, C++, and Java, functions (programs) that are very useful are collected in various '''Libraries''' and thus relates to dependency issues that were discussed when compiling C programming code in your OPS25 course. We do not go into detail involving Libraries for this course since Python is an interpreted (i.e. not compiled) language.

:#Before proceeding, make certain that you identify any and all errors in lab3a.py. When the checking script tells you everything is ok OK before proceeding to the next step.