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Simple Arithmetic In Bash, Perl and Awk--More Porting

May 29, 2008, 07:30 (0 Talkback[s])

[ Thanks to Mike Golvach for this link. ]

"Today we're going to continue along on our series of posts dealing with porting code between the bash shell, Perl and awk. In previous posts, we've looked at the basics regarding simple string variables, simple one-dimensional arrays and associative arrays (sometimes referred to as hashes or 'lookup tables').

"Before we move on to logical programming constructs (such as if-conditionals and while-loops), it's important to go over a few other basic concepts that require translation in order to work in the same manner in all three languages. Today we're going to demonstrate how each of bash, Perl and awk deal with simple arithmetic. Note that we won't be dealing specifically with floating point math (although it is possible to do) since that's slightly beyond the scope of this article (but it will be--huge hint--the subject of our next post in this series... variable scope, that is)..."

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