How do you use lookahead and lookbehind with a short example?

Lookahead, Lookbehind, Perl, Regex

This example illustrates how to use lookahead and lookbehind assertions in Perl regular expressions.


        # Example of using lookahead and lookbehind in Perl
        my $string = "I love Perl programming!";
        
        # Using lookbehind to match 'love' that is preceded by 'I '
        if ($string =~ /(?<=I )love/) {
            print "Matched: 'love' preceded by 'I '\n";
        }
        
        # Using lookahead to match 'Perl' that is followed by ' programming!'
        if ($string =~ /Perl(?= programming!)/) {
            print "Matched: 'Perl' followed by ' programming!'\n";
        }