how to leave decimal places to 1 without rounding

Question

I need to convert my value 2.8634 to 2.8. I tried the following ,

var no = Math.Round(2.8634,2,MidpointRounding.AwayFromZero)

I'm getting 2.87.

Suggest me some ideas how to convert.

Thanks

score 5 · Accepted Answer · edited May 23 '17 at 12:08

5

This might do the trick for you

decimal dsd = 2.8634m;
var no = Math.Truncate(dsd * 10) / 10;

Math.Truncate calculates the integral part of a specified decimal number. The number is rounded to the nearest integer towards zero.

You can also have a look on the difference between Math.Floor, Math.Ceiling, Math.Truncate, Math.Round with an amazing explanation.

edited May 23 '17 at 12:08

Community

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answered Jan 06 '17 at 07:36

Mohit S

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Happy to help you @shalusri Happy Coding :) – Mohit S Jan 06 '17 at 08:36

score 0 · Answer 2 · edited Jan 06 '17 at 07:35

0

Use this one.Hope this will work for you.

var no = Math.Round(2.8634,1,MidpointRounding.AwayFromZero)

edited Jan 06 '17 at 07:35

Buddy

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answered Jan 06 '17 at 07:34

Shahzad Riaz

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it's 2.9, he wants to get 2.8 – Maksim Simkin Jan 06 '17 at 07:37

soupdog · Answer 3 · 2017-01-06T19:57:14.517

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It's a tad more cryptic (but more efficient) than calling a Math method, but you can simply multiply the value by 10, cast to an integer (which effectively truncates the decimal portion), and then divide by 10.0 (or 10d/10f, all just to ensure we don't get integer division) to get back the value you are after. I.e.:

float val = 2.8634;
val = ((int)(val * 10)) / 10.0;

edited Jan 06 '17 at 19:57

answered Jan 06 '17 at 07:34

soupdog

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how to leave decimal places to 1 without rounding

3 Answers3