Re^2: Regex to find the number of positive, negative, and 0 integers within a data set

Thanks for the post! I came up with the regex for the positive ints.

while( my $num = <DATA> ) {
        chomp($num);
        ## print "num=[$num]\n";
        if ( $num =~ /^[1-9]\d*$/ ) {
                $ctrP++;
        }
[download]

I would like for it to be in regular expressions so that I can learn how to use them properly. I am having trouble so that the regex for the negative ints finds only negative ints.

Comment on Re^2: Regex to find the number of positive, negative, and 0 integers within a data set Download Code

Replies are listed 'Best First'.
Re^3: Regex to find the number of positive, negative, and 0 integers within a data set by stevieb (Canon) on Feb 28, 2017 at 17:59 UTC
`/^-\d+$/` See perlretut and perlre.	[reply] [d/l]