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say $string.uc
say $string.lc</lang>
 
=={{header|Perl 6}}==
<lang Perl 6>my $word = "alphaBETA" ;
say $word.uc ; #uppercase
say $word.lc ; #lowercase
say $word.ucfirst ; #first letter uppercase
say $word.lcfirst ; #first letter lowercase
say $word.capitalize ; #first letter uppercase, rest lowercase
</lang>
Output:
<pre>ALPHABETA
alphabeta
AlphaBETA
alphaBETA
Alphabeta
</pre>
 
=={{header|PHP}}==