these will work even if it is a double digit in $var (ie: 1 and 10 will both succeed for the first example) but if you only want one digit in range maybe something like:
print $& if $var =~ /^[1-3]$/;
or ... better yet ... if you are going to be doing this alot and with strings as well as digits ...
sub look_into {
my $archetype= shift;
eval 'sub { $_[0] =~ /$archetype/o; }'
}
my $is_text_am_too_red = look_into q/\b(am|too|red)\b/;
my $single_digit_in_range = look_into q/^[1-5]$/;
my $double_digit_in_set = look_into q/^[5-7][49]$/;
# etc.
if($is_text_am_too_red ->($_)){ print "get some sleep!" }
if($single_digit_in_range ->($_)){ print "single digit in range!" }
if($double_digit_in_set ->($_)){ print "double digit in set!" }
#etc.
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