How to round to a specific decimal accuracy?

Question

I have a value var i = 0.69999980926513672. I need to round this value to 0.7 is there a built-in method that will do this?

Answer 1

http://msdn.microsoft.com/en-us/library/system.math.round%28VS.71%29.aspx

Answer 2

Use the Math.Round method:

double i = 0.69999980926513672;
double result = Math.Round(i, 2);

Answer 3

You are looking for the Math.Round method.

//first param is number to round
//second param is the accuracy to use in the rounding (number of decimal places)
Math.Round(i, 2)

Answer 4

Use one of:

System.Math.Round (i, 1, MidpointRounding.ToEven);
System.Math.Round (i, 1, MidpointRounding.AwayFromZero);

The difference is how it handles numbers that are equidistant to the rounding point (e.g., 0.65 in your case could either go to 0.7 or 0.6).

Here is a answer I gave to another question which holds much more information.

Answer 5

Console.WriteLine(System.Math.Round(0.69999980926513672d, 1));

-- edit

wow, you blink and there are 5 other answers!