Re: Test if string is a number?

Siebe Tolsma Thu, 30 Jun 2005 08:45:16 -0700

Title: Re: Test if string is a number?

How about regexp?

/^\-?(\d+\.?\d*|\.\d+)$/

----- Original Message -----

From: Joe Discenza

To: Chris Wagner ; perl-win32-users

Sent: Thursday, June 30, 2005 4:48 PM

Subject: RE: Test if string is a number?

Chris Wagner wrote, on Thu 6/30/2005 08:48

: Wow there's been a lot of heavy duty code proposed to do something so
: simple. The answer is in how Perl converts between the two.
:
: print "is a number" if $var eq $var + 0;
: print "not a number" if $var ne $var + 0;

Except if $var is, say, '0.00'. Then $var + 0 is '0', and won't eq $var.

Joe

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Re: Test if string is a number?

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