perldoc perlop
If, however, the variable has been used in only string contexts since it was set, and has a value that is not the empty string and matches the pattern /^[a-zA-Z]*[0-9]*\z/
So yes, it's the dot.
Caution: Contents may have been coded under pressure.

In reply to Re: incrementing strings by Roy Johnson
in thread incrementing strings by deathbygoats

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