Hi There How to truncate double type in an exact digit precision.

imrealfighter
07 Jan 2021, 03:04

RE: RE:

gmkenneyy said:

imrealfighter said:

HI there hope you guys doing well in this 2021 want some help here. 

Edit : Problem Solved !!! but welcome to another suggestion and method. Thx.

( From Philippe Leybaert I just edit some ) 
----------------------

​
public double RoundDown(this double value, int digits)
{
     double factor = Math.Pow(10,digits);

     return Math.Truncate(value * factor) / factor;
}

​---------------------

I want to compare double type with double type (which is a product price with product price or product price with some price level) and I found that we could use double.CompareTo() method.

but have some problem with that 

assume 

double a = 1.2345

double b = 1.23456789  if we compare these two on 4 digit precision it will get the equal result right.

so to use double.CompareTo() we need to get b price with an exact digit as a 

I try to use Math.Round() but it doesn't give what I want Round() medthod it add the value of b up 1.2346 instead of 1.2345 

is there a way then? 

Thank you. 

Rounding double b = 1.23456789 to 4 decimal places will give you 1.2346 - so its correct!

Thank you.again gmkenneyy at first I thought that price on the chart is precisely calculated without round numbers but as result comeout yeap it uses Math.Round();