Numeric operation in C#

Question

1.00/5 (2 votes)

See more:

Hi I'm going crazy with this easy situation

int abc = 0;
abc = 100 / 330 * 50;
Console.WriteLine(abc);

when I check abc is 0

But if I use this formula (

100 / 330 * 50;

) in Excel I return

15,15151515

What I have tried:

What's wrong ??

I need 15 like result...

Posted 1-Mar-22 1:03am

antobaro

Updated 1-Mar-22 1:17am

Add a Solution

3 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Accepted Answer · 2022-03-01T01:13:00

Solution 1

You are using integer arithmetic, and 100 / 330 is zero. You need to use either Double or Decimal types to get the correct answer:

C#

double abc = 0.0;
abc = 100.0 / 330.0 * 50;
Console.WriteLine(abc);

Posted 1-Mar-22 1:13am

Richard MacCutchan

Comments

Maciej Los 1-Mar-22 12:29pm

5ed!

Richard MacCutchan 1-Mar-22 12:35pm

:thumbsup:

CPallini · Accepted Answer · 2022-03-01T01:14:00

Solution 2

Integer division, my dear.
Try

C#

double abc = 0;
abc = 100.0 / 330 * 50;
Console.WriteLine(abc);

Posted 1-Mar-22 1:14am

CPallini

Comments

Maciej Los 1-Mar-22 12:29pm

5ed!

Patrice T · Accepted Answer · 2022-03-01T01:17:00

Solution 3

Quote:
Hi I'm going crazy with this easy situation

In C, a division of integers result in an integer.
Thus 100/330 results in 0.
Try to replace

C++

abc = 100 / 330 * 50;

with

C++

abc = 100 * 50 / 330;

Posted 1-Mar-22 1:17am

Patrice T

Comments

Maciej Los 1-Mar-22 12:29pm

5ed!

Patrice T 1-Mar-22 12:47pm

Thank you