Re^2: what is the best way to seperate the digits and strings from variable ?

Please, test your code.

\d* will match 0 (ZERO) or more digits.

Thus, it will happily match an empty string at the beginning of a string like "abc123" and return a 0 length string. Try it.

The right expression to use in this case is \d+.

Moreover, a capturing regular expression should always be used with a test:

my $num;
my $variable = "abc123";
if ( $variable =~ /(\d+)/)
{
    $num = $1;
}
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