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Asked: 2026-05-25T21:23:48+00:00

It seems to be rounding problem. I have array of float[] and some operations

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It seems to be rounding problem. I have array of float[] and some operations over this array. I need to write unit tests for this functionality, but comparing expected values to the resulted values happened to be not a simple task taking into account this rounding issues. Is any workaround to test math operations over my array? Thanks

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  1. Editorial Team

    When using floats or doubles in unit tests, your testing framework may allow you to account for an acceptable delta. Using NUnit, for example, you might write 

    double expected = 1d;
double delta = 0.0001d;
double actual = classUnderTest.Method();
Assert.AreEqual(expected, actual, delta);

    Understand that floats and doubles are inherently imprecise for certain things, and that is by design. They represent numbers in base 2. If you need accurate base 10 representation, use the appropriate type for that: decimal.

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