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Possible Duplicate:
Floating point inaccuracy examples

If i say round(152.77499999999998,2) the answer becomes 152.78. Should it not look at the 3rd number after the decimal point and if it is 5 or higher round up and if it is 4 or lower round down, hence the answer should be 152.77?

Thanks

Community
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Pjn2020
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3 Answers3

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You should do: 

round(152.77499999999998 * 100)/100

to get the exact number! :)

Michael Wright
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It is very possible that in whatever internal representation 152.77499999999998 gets folded to it is actually more like 152.77500001754…; and hence the rounding goes up.

Williham Totland
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What php is going is regular rounding.

This same question was asked here 2 years ago:
http://www.webdeveloper.com/forum/showthread.php?t=247953 (what are the chances?)

Naftali
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