Output the initial in lowercase and uppercase

    

while (<>) {
    print "Initial lowercase: " . lcfirst;
    print "Initial uppercase: " . ucfirst;
}

1.	Convert all letters of $string to lowercase
2.	Convert all letters of $string1 to uppercase
3.	Convert input to lowercase and uppercase
4.	Lower and upper case
5.	Convert mixed-case input

Output the initial in lowercase and uppercase : Case « String « Perl