$n=~s/\.|\.0+$//
That's broken. It deletes the period but leaves in the trailing zeros. This is better, and does what's requested: 
s/\.?0*$//;

[download]

Gary Blackburn
Trained Killer

In reply to Re: Re: Eliminating Trailing Zeros by Trimbach
in thread Eliminating Trailing Zeros by Anonymous Monk

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