I have a value that may be a letter followed by a 1 or 2. If the numebr is 1, I would like to make it a 2. If the number is 2, I would like to make it a 1. I can't seem to get it to work. I know there must be a simple way. 
ex: 
A1 changed to A2
A2 changed to A1

Thanks

$m = "A1";
or
$m = "A2";

This wont work:
$m =~ tr(/1/2/ | /2/1/);

This works, but I dont like it:

if ($m =~ /1/){
     $machine =~ s/1/2/g;
}
else{
     $m =~ s/2/1/g;
}

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In reply to replace a digit with another digit by kevyt

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