C# How to determine if a number is a multiple of another?

Question

Without using string manipulation (checking for an occurrence of the . or , character) by casting the product of an int calculation to string.

Answer 1

I don't get that part about the string stuff, but why don't you use the modulo operator (%) to check if a number is dividable by another? If a number is dividable by another, the other is automatically a multiple of that number.

It goes like that:

   int a = 10; int b = 5;

   // is a a multiple of b 
   if ( a % b == 0 )  ....