[Chicago-talk] addition weirdness

[Whitney Jackson]

When I run :

#!/usr/bin/perl

$total = 0;
while (<>) {
  $total += $_;
}
print "$total\n";

with a file full of numbers (http://laughingman.net/numbers.txt) as 
input I get 2752872.74999999.  Strangely the file only contains numbers 
with two digits after the decimal point.  Other number lists (including 
this same file without its last line) produce normal results.

Any idea why this is happening?

Whitney