below code is weird. when i debug it, i can see both "result" and "round" are 5, but output is "false". Any idea?
double result = Math.Log (243, 3); // 5
double round = Math.Round (result); // 5
Console.WriteLine (result == round);
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jojo
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What if you use decimals? – Allan S. Hansen Jan 08 '16 at 07:12
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1Your `result` will be `4.9999999999999991` not `5`. – Soner Gönül Jan 08 '16 at 07:13
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I don't know where are you looking but result == 4.9999999999999991 – Giorgi Nakeuri Jan 08 '16 at 07:14
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Comparison of floating point with equality operator could have loss of precision while rounding values. You can fix this by compare a difference with epsilon. Use a Tolerance like this:
Console.WriteLine(Math.Abs(result - round) < 0.0000001); // True
Salah Akbari
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You can as well provide rounding fration `double round = Math.Round(result,15); ` – Rahul Jan 08 '16 at 07:20