Perl中的单行注释和多行注释语法（perl的if语句）学到了

#print “Hello,World!”;

“””

 用三个双引号，多行注释

 用三个双引号，多行注释

 用三个双引号，多行注释

“””

”’

 用三个单引号，多行注释

 用三个单引号，多行注释

 用三个单引号，多行注释

”’

This is a comment.

This is a comment, too.

This is a comment, too.

=end

# This is a comment.

# This is a comment, too.

# This is a comment, too.

 多行注释内容

 多行注释内容

 多行注释内容

 =cut

#! C:\Perl\bin\perl -w 

use strict; 

use warnings; 

use String::Util ‘:all’; 

use 5.016; 

=my $element=” abc         “; 

printf “<%s>\n”, trim($element); 

printf “<%s>\n”, trim($element, right=> 0); 

printf “<%s>\n”, trim($element, left => 0); 

=cut