Dear Group,
I'm new to Perl and I have a simple question:
I ask for the entry of a number vie <STDIN>:
----------------------------------------
#!/usr/bin/perl -w
use strict;
my $foo;
print "Enter number: ";
$foo = <STDIN>;
comp($foo);
----------------------------------------
Now I would like to check wether the user really entered a number and
not letters. What would a check like that look like? A regular
expression like this:
----------------------------------------
unless ($foo =~ /[a-zA-Z\D+][^.][\D*]/ {...};
----------------------------------------
Is there an easier or more beautiful way?
Also, how would I substract just a number from a string? Searched the
net for an example but didn't succeed, so sorry for asking a question
like that...
Many thanks for your help!
Kind regards,
Jan-Henrik
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