There are perfectly valid numbers that Perl can deal with, even without warnings, which still contain non-digit characters. 1.3 comes to mind. And so do -5 and 3e5.

Furthermore, there are strings containing no \D characters, but which Perl cannot treat as numbers. "๑๒๓" for instance.

If you wish to find out whether a string looks like a number, use Scalar::Util::looks_like_number. Don't use simplistic regexes.

In reply to Re^2: Style and warnings by JavaFan
in thread Style and warnings by api

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