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How to format a number?

Posted on 2001-06-15
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Last Modified: 2010-03-05
I want to format numbers by inserting commas, like 1012345 as 1,012,345 Is there a nice reliable way of doing that?
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Question by:Biffo
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marecs earned 200 total points
ID: 6194150
From the Perl FAQ

perldoc -q "How can I output my numbers with commas added?"

sub commify {                                                  
    local $_  = shift;                                          
    1 while s/^([-+]?\d+)(\d{3})/$1,$2/;                        
    return $_;                                                  
}                                                              

$n = 23659019423.2331;                                          
print "GOT: ", commify($n), "\n";                              
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