The code that you write will make its way into many programs.
And, although sharing is good, you need to be careful. One programmer might take your code and use it in an unexpected way, while another might change it without even letting you know. You might want to use one function in all your programs and, over time, that function's code might change to suit your needs. Smart programmers take advantage of modular programming techniques to keep their workload manageable. Let's find out how in the pages that follow...
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