Re: Decimals acting wierd : 5.3 * 3 = 15.899999999999999

That's because numbers are floating-points numbers; you'll find this in all languages/platforms whose types follow IEEE 754 Floating-points Arithmetics (Java/JVM, JS, C, .NET, etc.) that is, almost everywhere.

Java has BigDecimal if you need precision; it's emulated in GWT but performs much slower than doubles, which just map to JS numbers.

On Sunday, September 29, 2013 12:20:36 PM UTC+2, Martones wrote:

Hey guys,

I had this problem hounting me since quite a while. I'm using double types in the equation above and I have this wierd precision result : 

5.3 * 3 = 15.899999999999999

This is not the first time at all and I already saw this with floats / without multiplication and so on. Before I spend few hours figuring out some test cases, can anyone give me any directions of where and what to search ? :)

Many thanks everyone !

Ludovit

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