Code Smell 02 - Constants and Magic Numbers

A Magic Number is a hard-coded value that may change at a later stage, but that can be therefore hard to update. It's a numeric value that’s encountered in the source but has no obvious meaning.

Yet more difficulties arise when you need to change this magic number. Find and replace won’t work for this: the same number may be used for different purposes in different places, meaning that you will have to verify every line of code that uses this number.

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