Having trouble performing division

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When I "attempt" to calculate a expression that involves division I'm not getting the correct answer. Example: double number = 5/9; Console.WriteLine(number.ToString());, the result is 0! What's going on here? Why am I not getting .55555...?

Posted 11-Aug-10 17:36pm

d.allen101

Updated 12-Aug-10 2:44am

Toli Cuturicu

v2

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3 solutions

Solution 2

thanks. that worked but I don't understand why I had to type cast to double considering that I initially declared "number" a double? would you please clarify this with me?

Posted 11-Aug-10 18:11pm

d.allen101

v2

Comments

JF2015 12-Aug-10 0:19am

As I understand it this has been done by design in oo languages.
Here is a link from MSDN that handles the division operation:
http://msdn.microsoft.com/de-de/library/3b1ff23f.aspx

Toli Cuturicu 12-Aug-10 8:44am

Reason for my vote of 1
fake answer

Solution 3

thank you! I'm about to check out the MSDN link you sent me. Again thank you!

Posted 11-Aug-10 18:22pm

d.allen101

Comments

Toli Cuturicu 12-Aug-10 8:45am

Reason for my vote of 1
fake answer

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**JF2015** · Accepted Answer · 2010-08-11T18:08:00

Solution 1

what you would need to do is:

double number1 = 5.0/9.0;
double number2 = (double)5/(double)9;
double number3 = 5D/9D;

Posted 11-Aug-10 18:08pm

JF2015

Updated 11-Aug-10 19:07pm

v4

Comments

Peter_in_2780 12-Aug-10 0:50am

number2 will be zero, for the same reason as OP's original problem.

JF2015 12-Aug-10 0:55am

Updated the code since Peter_in_2780 noticed an error

Roger Wright 12-Aug-10 1:29am

Reason for my vote of 5
An obscure little item that catches most the first time, properly explained.

Toli Cuturicu 12-Aug-10 8:46am

5.0 / 9
(double)5 / 9
5D / 9
is enough (no need for the second operand to be double)