Round double off with 2 digits after comma - C#

Question

I have the number 12.1799999 and it should become 12.17 How does it work in c#?

If you intent to round down, then use `Math.Floor(number)` – Steven Sep 19 '22 at 08:39 — Steven, Sep 19 '22 at 08:39
but if i use it the number becomes 12 – Ostap Filipenko Sep 19 '22 at 08:39 — Ostap Filipenko, Sep 19 '22 at 08:39

score 2 · Accepted Answer · answered Sep 19 '22 at 09:00

2

var n = 12.1799999M;
n = Math.Floor(n * 100) / 100;

answered Sep 19 '22 at 09:00

Magnus

score 0 · Answer 2 · answered Sep 19 '22 at 08:39

0

If you intent to round down, then use Math.Floor(number, amountOfDecimals)

amountOfDecimals should be 2 in your case

answered Sep 19 '22 at 08:39

Steven

No overload for method 'Floor' takes 2 arguments – Ostap Filipenko Sep 19 '22 at 08:40
The function floor takes only one argument – Ostap Filipenko Sep 19 '22 at 08:40
I see, I thought `Math.Floor()` had a decimal overload, like `Math.Round()` – Steven Sep 19 '22 at 09:36

2 Answers2