Perl | uc() Function

uc() function in Perl returns the string passed to it after converting it into uppercase. It is similar to ucfirst() function which returns only first character in uppercase.

Note: The characters which are already in UpperCase are not modified.

Syntax: uc String

Returns: string in uppercase.

Example 1:

#!/usr/bin/perl -w

# String to be converted to UPPERCASE
$string = "geeksfOrGeeks";

print "Original String: $string\n";

# Converting the string to
# UPPERCASE using uc() function
$UPPER_STRING = uc($string);

print "Modified String: $UPPER_STRING";

Output:

Original String: geeksfOrGeeks
Modified String: GEEKSFORGEEKS

Example 2:

#!/usr/bin/perl -w

# String to be converted to UPPERCASE
$string = "WelComEToGeeKS";

print "Original String: $string\n";

# Converting the string to
# UPPERCASE using uc() function
$UPPER_STRING = uc($string);

print "Modified String: $UPPER_STRING";

Output:

Original String: WelComEToGeeKS
Modified String: WELCOMETOGEEKS