taking just two digits of a Number of type double without rounding it

Question

I have this Number

double Nb=4.9584763251

how can I make get only two digits after the comma without rounding the number :

Nb=`4.95` and not `4.96`

using the Math.Round(Nb,2) will return 4.96 is there any way to fix this ?

keep it as a number because later i want to compare it with other variable — Sora, Jan 15 '15 at 08:12
Use `decimal` instead of `float` otherwise any operation on it can introduce rounding errors — Panagiotis Kanavos, Jan 15 '15 at 08:51

MakePeaceGreatAgain · Accepted Answer · 2015-01-15T09:00:14.063

1

You may use Math.Truncate(Nb * 100) / 100m

edited Jan 15 '15 at 09:00

answered Jan 15 '15 at 08:13

As the answers to the duplicate question show, float should be avoided otherwise rounding errors are unavoidable – Panagiotis Kanavos Jan 15 '15 at 08:51
Changed, thanks for the hint – MakePeaceGreatAgain Jan 15 '15 at 09:00

score 0 · Answer 2 · answered Jan 15 '15 at 08:12

0

 double x = ((int)(Nb*100))/100.0

answered Jan 15 '15 at 08:12

rkrahl

this would give me `4.0` – Sora Jan 15 '15 at 08:14
I'd use `decimal x`, i.e. `decimal x = ((int)(Nb * 100)) / 100m;` – Ulugbek Umirov Jan 15 '15 at 08:15
@Sora You might have set the braces whrong – MakePeaceGreatAgain Jan 15 '15 at 08:16

2 Answers2