What does the % operator exactly do?

Question

Today I had an assignment that told me to only allow numbers through that are a multiplication of 5.
After looking around on the internet I found the % operator. I thought this operator only removed the decimals, for example 5 % 2 equals 2.
But I could use it in my program as if(iWithdraw % 5 == 0){do this and that}.
I'm glad it worked but I still don't know why it worked haha.
Can someone explain this to me?

Hemant Srivastava · Answer

% operator is used to find out the remainder if we divide one number to another. For example: If you divide 15 by 5 it will give 0 since after dividing 15 by 5 we don't get any reaminder at the end. similerly 3 divided by 2 wil give you 1 (as a remainder) Here is the code for more explaination: class MainClass6 { static void Main() { Console.WriteLine(5 % 2); // int Console.WriteLine(-5 % 2); // int Console.WriteLine(5.0 % 2.2); // double Console.WriteLine(5.0m % 2.2m); // decimal Console.WriteLine(-5.2 % 2.0); // double } } /* Output: 1 -1 0.6 0.6 -1.2 */

Jignesh Trivedi · Answer

hi % operator computes the remainder after dividing its first operand by second one. For example 5%2 first of it perform 5/2 and find nearest devided value 2*2 = 4 4 is nearest value of 5 than it perform 5-4=1 so answer of 5%2 = 1 Please refer http://msdn.microsoft.com/en-us/library/0w4e0fzs.aspx hope this will help you.

Hemant Srivastava · Answer

If it helped you please mark the answer accepted.