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Asked: 2026-05-15T22:00:10+00:00

Is there any in built function in java to tell me how many decimal

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Is there any in built function in java to tell me how many decimal places in a double. For example: 

101.13 = 2
101.130 = 3
1.100 = 3
1.1 = 1
-3.2322 = 4 etc.

I am happy to convert to another type first if needed, I have looked at converting to bigdecimal first with no luck.

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  1. Editorial Team

    No.

    1.100 and 1.1 are exactly the same value (they are represented exactly the same bit-for-bit in a double).

    Therefore you can’t ever get that kind of information from a double.

    The only thing you can do is to get the minimum number of decimal digits necessary for a decimal number to be parsed into the same double value. And that is as easy as calling Double.toString() and checking how many decimal digits there are.

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