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Why are global variables bad?

April 26, 2017bad global variables

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Why are global variables bad?

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=================================== us writes (lightly edited): I’ll always fondly remember the outburst of the notorious and seasoned user Lars Gregersen to a recent poster (that most likely started this question) and will give it on to my students: The short answer is: Don’t use global variables. The longer answer is: Don’t use global variables unless you absolutely have to. Now, 1) Using globals is perfectly ok (that’s why they here on first place), just like `for”s and `while”s and other intelligible 2nd generation computer language constructs (that MATLAB is built on). 2) Using globals is a blasphemy from a programmer’s point of view because it shows that she/he didn’t think ahead but was rather sloppy… and just kept adding on those never-ending “important set up” parameters that she/he needed to use by all the axes – or whatever – of a one single project … 3) Using globals is a problem in terms of book-keeping if(f) you end up having zillions of them ho