Lady_Aleena is (almost completely ) right: at the very least, anything that you get from the user using <STDIN> should be chomped to get rid of the end of line characters (the only very minor point where she is not completely right is that she has a small typo on the name of the variable, $opt1 instead of $opr1).

This is especially important for the operation ($opr1 variable), that will never be equal to "+" (for example) if you don't chomp it, but more probably to things like "+\n" (under Unix) or "+\r\n" (under Windows) or something else (on Mac, I don't know for sure, it used to be "+\r", but I think it has changed some times ago and is probably like Unix nowadays). Anyway, whatever the trailing character(s) is not so important, the point is that you should remove it using the chomp function.

In reply to Re: calculator help by Laurent_R
in thread calculator help by Paradizingmania

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