How can I divide two integers to get a double?

Question

How do I divide two integers to get a double?

Answer 1

You want to cast the numbers:

double num3 = (double)num1/(double)num2; 

Note: If any of the arguments in C# is a double, a double divide is used which results in a double. So, the following would work too:

double num3 = (double)num1/num2; 

For more information see:

Dot Net Perls

Answer 2

Complementing the @NoahD's answer

To have a greater precision you can cast to decimal:

(decimal)100/863 //0.1158748551564310544611819235 

Or:

Decimal.Divide(100, 863) //0.1158748551564310544611819235 

Double are represented allocating 64 bits while decimal uses 128

(double)100/863 //0.11587485515643106 

In depth explanation of "precision"

For more details about the floating point representation in binary and its precision take a look at this article from Jon Skeet where he talks about floats and doubles and this one where he talks about decimals.