Wouldn't 
$na =~ s/(?<=\.\d\d\d)\d*$//;

[download]
be done better and clearer as: 
chop $na;

[download]
?

Liz

Update:
Since the 4 digits are guaranteed by the sprintf, there should be no problem in using chop().

In reply to Re: Re: Want to Truncate A Number... NOT round it by liz
in thread Want to Truncate A Number... NOT round it by Anonymous Monk

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