The output you've posted did not come from the code that you posted.

Running the code you posted, (second code block) under 5.10 and 5.18 I get this output:

The 1 is a whole number
The 1 is a whole number
The 123.1 has nondigits
The 0.1 has nondigits

[download]

I suspect the code you actually ran to get the output you posted included:

my @numbers = qw(1, 1.0, 123.1, 0.1);

[download]

And did not have warnings enabled.

But that doesn't explain all the differences.

Try posting the actual code you run; and the actual output you get.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
I'm with torvalds on this Agile (and TDD) debunked I told'em LLVM was the way to go. But did they listen!

In reply to Re: How do I determine with a regular expression whether a scalar is a number/whole/integer/float? by BrowserUk
in thread [SOLVED] How do I determine with a regular expression whether a scalar is a number/whole/integer/float? by thanos1983

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