Perl String lc() Function

How to Use the String lc() Function to Convert a String to Lowercase

Starting out with a new programming language can be challenging. Learning the functions is one way to go about it. The Per;l string lc() function and uc() function are two basic functions that are easy to understand—they convert a string to all lowercase or all uppercase respectively.

Perl String lc() Function

The Perl lc() function takes a string, makes the entire thing lowercase and then returns the new string.

For example:

#!/usr/bin/perl

$orig_string = "This Test Is Capitalized";

$changed_string = lc(  $orig_string );

print "The Resulting String is: $changed_string\n";

When executed, this code yields:

The Resulting String is: this test is capitalized

First, $orig_string is set to a value—in this case, This Test Is Capitalized. Then the lc() function is run on $orig_string. The lc() function takes the entire string $orig_string and converts it to its lowercase equivalent and prints it out as instructed.

Perl String uc() Function

As you might expect, Perl's uc() function converts a string to all uppercase characters in the same manner. Just substitute uc for lc in the example above, as shown:

#!/usr/bin/perl

$orig_string = "This Test Is Capitalized";

$changed_string = uc(  $orig_string );

print "The Resulting String is: $changed_string\n";

When executed, this code yields:

The Resulting String is: THIS TEST IS CAPITALIZED

About Perl

Perl is a feature-rich programming language that was originally developed for use with text. It is cross-platform and runs on more than 100 platforms. Perl works with HTML and other markup languages, so it is frequently used in web development.