Math Rounding Requirement

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Hi,

I have a requirement where decimal with .5 and less should be rounded down and decimal with .6 and above should be rounded up. Let me explain you with an example.

13.5 --> 13.0 is the expected value
13.6 --> 14.0 is the expected value

Now should i have to code it or is there any built in functionality in c#.

Please confirm

[EDIT]

What is meant is

13.4 --> 13 is the expected value
13.5 --> 13 is the expected value
13.6 --> 14 is the expected value

Please confirm if i have to code or is there any in built functionality

Posted 27-Apr-11 20:05pm

sri_3464

Updated 27-Apr-11 20:20pm

Sergey Alexandrovich Kryukov

v2

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anvas kuttan · Answer 1 · 2011-04-27T20:26:00

Solution 4

C#

double num = 5.5;
     int intpart = (int)num;
     double decpart = num - intpart;
     if (decpart > .5)
     {
         intpart = intpart + 1;
     }

here is your answer

happy coding ;)

Posted 27-Apr-11 20:26pm

anvas kuttan

m@dhu · Answer 2 · 2011-04-27T20:08:00

Solution 1

Math.Round[^]

Posted 27-Apr-11 20:08pm

m@dhu

Comments

Rajesh Anuhya 28-Apr-11 3:06am

Not a Helpful answer for OP
-2

m@dhu 28-Apr-11 4:28am

Well the op wants to round the value. Math.Round(13.4) gives 13.
or am I missing something? :doh:

Rajesh Anuhya 28-Apr-11 4:34am

Your link for Math.Round function, but OP already know the Round function, his requirement is different. and normal Math.Round(13.5) will return 14 not 13

m@dhu 28-Apr-11 4:58am

OP could use the function with an if condition for his requirement something similar you posted. Thanks for the comment.
Math.Round(13.5) will return 14 not 13
Thats a typo. Corrected.

Rajesh Anuhya 28-Apr-11 5:00am

solution is given, not for banker's rounding

CodeHawkz 29-Apr-11 2:18am

OP has no idea about Math.Round. (Proof: Now should i have to code it or is there any built in functionality in c#.)

My 5 :) You should not spoon feed neither be harsh. Way 2 go.

Rajesh Anuhya 29-Apr-11 2:30am

OP question is targeted for a specified logic, and she is asking for the built in function for her logic(Banker's rounding), Actually OP can directly ask question as BANKER'S ROUNDING in C#. But i thing she don't what is bankers rounding. I am very sorry to all if my words are harsh.

CodeHawkz 29-Apr-11 2:34am

hehe. Sorry I didn't mean you were harsh.

I just meant that, OP didn't know how to achieve it. OP wanted to go ahead and write the code himself/herself. But wanted to check whether it's already there in .Net Whether it's banker's rounding or not, OP didn't care (Even I didn't know that it was called that before you mentioned :D)

We all are trying to help :D Thumbs up for your effort :)

Ankit Rajput 28-Apr-11 3:50am

why this one is not useful?

m@dhu 28-Apr-11 4:29am

You should have used reply button to ask Rajesh.

Rajesh Anuhya · Answer 3 · 2011-04-27T20:37:00

Solution 5

Try this logic..

MIDL

double val = Convert.ToDouble(textBox1.Text);
MessageBox.Show(Math.Round((val % .5) == 0 ? (val - 0.1) : val).ToString());

Posted 27-Apr-11 20:37pm

Rajesh Anuhya