珀尔 | lc() 小写转换函数

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

Syntax: lc(VAR)
Parameter: 
VAR: Sentence which is to be converted to lower case
Return: 
Lowercased version of VAR, or $_ if VAR is omitted 
 

示例 1：

Perl

#!/usr/bin/perl
 
# Original String containing both
# lower and upper case letters
$original_string = "GEEkS FoR geEkS";
 
# Converting the string to Lower case
$changed_string = lc($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

示例 2：

Perl

#!/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 case
$changed_string = lc($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