Perl lc()函数用于小写转换

Perl中的lc()函数返回VAR的小写版本，如果省略了VAR，则返回$_。

语法： lc(VAR)

参数：

VAR： 要转换为小写的句子

返回：

VAR的小写版本，如果省略VAR，则为$_

例1：

#!/usr/bin/perl
 
# Original String containing both
# lower and upper case letters
original_string = "GEEkS FoR geEkS";
 
# Converting the string to Lower casechanged_string = lc(original_string);
 
# Printing the original String
print "Original String :original_string\n";
 
# Printing the Changed String
print "Changed String : $changed_string\n";

输出：

Original String : GEEkS FoR geEkS
Changed String : geeks for geeks

例2：

#!/usr/bin/perl
 
# Original String containing
# lower and upper case letters
# as well as numerics
original_string = "G33kS F0R g3EkS";
 
# Converting the string to Lower casechanged_string = lc(original_string);
 
# Printing the original String
print "Original String :original_string\n";
 
# Printing the Changed String
print "Changed String : $changed_string\n";

输出：

Original String : G33kS F0R g3EkS
Changed String : g33ks f0r g3eks