Problem when calculate simple sum with php

Asked Feb 04 '22 at 13:29

Active Feb 04 '22 at 13:29

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I have a strange problem, I try to calculate a basic sum with php, the result must be egal to zero, but php return a strange value :

$test = ((0.37)+(0.31)-(0.68));
echo 'test4 : '.$test;

The result must be "0", but $test return : "-1.1102230246252E-16"

I realy don't understand why, have you an idea ?

Thanks

asked Feb 04 '22 at 13:29

Florian Richard

2

Short answer: when printing, you need to `round()` to the desired precision. When doing comparisons, you need to account for the error margin (do not `$a == $b`). When handling money, use integers. – Álvaro González Feb 04 '22 at 13:32
thanks it's exactly this – Florian Richard Feb 04 '22 at 13:48

0 Answers0