Math.Pow can't handle fractions ?

Question

Hello I saw this problem today. I used to calculate this: varX = Math.Pow(varx 1/3); Everytime I get only an integer that is completly wrong! But if I use this: varX = Math.Pow(varx 0.333333); Then the result is allright... What is wrong with this function? I can't express 1/3 as a double number cause it's endless. Please help me...

Frogleg · Answer

Try this 1: double dd = Math.Round(((double)1 / (double)3)5); 2: or decimal dd = Decimal.Round((decimal)1 / (decimal)35); varX = Math.Pow(varx dd);

Vulpes · Answer

Rather than use casts you can force double arithmetic like this: 1.0/3 or 1D/3 or decimal arithmetic with: 1M/3 As long as at least one operand is of type double or decimal then this will avoid integer arithmetic from being used.

Sascha B · Answer

Also works! I think it is more correctly than Froglegs round workaround. Thanks

Frogleg · Answer

You are too fast. I edit to include double

Sascha B · Answer

Instead of decimal I had to set it to double. And it WORKS! O_o It can't calculate with endless numbers can it? Many thanks