php calculate float HELP!!
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Published on 2010-04-18T09:54:57Z
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2010/04/18
10:03 UTC
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help!! i have weird math calculation here. hope someone will explain.
$a = 1.85/100;
$b = 1.5/100;
$c = 1.1/100;
$d = 0.4/100;
$e = 0.4/100;
$f = 0.4/100;
$g = 0.4/100;
$h = $a + $b + $c + $d + $e + $f + $g;
echo $h*100 ."<br>";
$i = $h-$a;
$i = $i-$b;
$i = $i-$c;
$i = $i-$d;
$i = $i-$e;
$i = $i-$f;
$i = $i-$g;
echo $i;
last $i value should be 0 but it returns 6.93889390391E-18
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