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programming-examples/perl/String/Lower and upper

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$stringlower = "perl ";
$stringupper = "PERL ";
$casestring = uc($stringlower);
print "\n\nUsing uc gives: $casestring \n\n";
$casestring = lc($stringupper);
print "\n\nUsing lc gives: $casestring \n\n";
$casestring = ucfirst($stringlower);
print "\n\nUsing ucfirst gives: $casestring \n\n";
$casestring = lcfirst($stringupper);
print "\n\nUsing lcfirst gives: $casestring \n\n";