In the 'yet another way to do it' category: 
my $tofind="s";
my $replacement="X";
my $variable="snaskes";

substr($variable, -1, 1) = $replacement if (substr($variable, -1, 1) e
+q $tofind);

print "$variable\n";

[download]
Trek

Update: Thanks to the CB folks for pointing out the mistake! Edited.

In reply to Re: Replace the last letter by TrekNoid
in thread Replace the last letter by Anonymous Monk

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