Solved

Given a number how can I round it to some number with two padded zeros

Posted on 2014-11-13
7
92 Views
Last Modified: 2015-01-08
If I have a number 2495, then this should be rounded to 2400

If I have 6321 , then 6300
 123456 , would be 123400
0
Comment
Question by:countrymeister
  • 3
  • 3
7 Comments
 
LVL 75

Assisted Solution

by:käµfm³d 👽
käµfm³d   👽 earned 250 total points
ID: 40440281
Relying on the behavior of integer division, you could do:

int number = 6321;
int rounded = (number / 100) * 100;

Open in new window

0
 

Accepted Solution

by:
e_livesay earned 250 total points
ID: 40440334
You need to subtract off the remainder that is left over when you divide by 100.  To do this use the modulo operator.

double abc_1   = 2495;
double abc_1_m = abc_1 - abc_1 % 100;

double abc_2   = 6321;
double abc_2_m = abc_2 - abc_2 % 100;

double abc_3   = 123456;
double abc_3_m = abc_3 - abc_3 % 100;

Open in new window


If you wanted 123456 to be rounded to 123000 then you would subtract (123456 modulo 1000) from 123456 instead of subtracting (123456 modulo 100) from 123456:

double abc_3   = 123456;
double abc_3_m = abc_3 - abc_3 % 1000;

Open in new window

0
 
LVL 33

Expert Comment

by:it_saige
ID: 40440336
Both Kaufmed and e_livesay, have simple and effective solutions that work equally well.

As e_livesay alluded to, if your stipulation changes (where you have to worry about 10's or 1000's), then you have to make sure to change the equation.

-saige-
0
Space-Age Communications Transitions to DevOps

ViaSat, a global provider of satellite and wireless communications, securely connects businesses, governments, and organizations to the Internet. Learn how ViaSat’s Network Solutions Engineer, drove the transition from a traditional network support to a DevOps-centric model.

 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 40440640
@e_livesay

You need to subtract off the remainder that is left over when you divide by 100.
That's exactly what integer division does  ; )
0
 

Expert Comment

by:e_livesay
ID: 40440888
@kaufmed

Agreed - the solutions are equivalent.  Didn't see your response until I'd written mine.
0
 
LVL 75

Expert Comment

by:käµfm³d 👽
ID: 40440914
@e_livesay

All good. I mistook the "... when you divide by 100" to be pseudo-directed at me  = )
0
 

Expert Comment

by:e_livesay
ID: 40440934
@kaufmed.

No problem.  Wondered if it might look like that after I saw that your post had come in before mine.  Not directed at you at all.
0

Featured Post

DevOps Toolchain Recommendations

Read this Gartner Research Note and discover how your IT organization can automate and optimize DevOps processes using a toolchain architecture.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Expression Evaluater 3 37
FInd Image Control Gridview 3 19
Adding items to a C# list incrementally 5 28
Amazon S3 Images with .Net 3 10
Wouldn’t it be nice if you could test whether an element is contained in an array by using a Contains method just like the one available on List objects? Wouldn’t it be good if you could write code like this? (CODE) In .NET 3.5, this is possible…
Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …

789 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question