Question

I’m trying to truncate a decimal part.

I mean create a function which do this.

1/9 ~ 0.11111111111111

So, if in the function set that wants to pick 5 decimals, must returns 0.11111

I was doing this using strings, but I guess is not a good idea. Is possible do that using math operations?

Answer 1

You can use

Math.Truncate

http://msdn.microsoft.com/en-us/library/7d101hyf.aspx

Edit: My version of a suitable method (though Gary has already shared one below)

    public static double Truncate(double number, int digits) 
    { 
        double conversionFactor = (Math.Pow(10.0, digits));
        return Math.Truncate(number * conversionFactor) / conversionFactor;
    }