Trying to divide an integer or decimal number by zero throws a DivideByZeroException exception. Dividing a floating-point value by zero doesn't throw an exception; it results in positive infinity, negative infinity, or not a number (NaN), according to the rules of IEEE 754 arithmetic. Because the following example uses floating-point division rather than integer division, the operation does not throw a DivideByZeroException exception.

code reference: System.DivideByZeroException.Class#2

For more information, see float and double.

The following Microsoft intermediate language (MSIL) instructions throw DivideByZeroException:

• div

• div.un

• rem

• rem.un

DivideByZeroException uses the HRESULT COR_E_DIVIDEBYZERO, which has the value 0x80020012.

For a list of initial property values for an instance of DivideByZeroException, see the DivideByZeroException.#ctor constructors.

The following example demonstrates an error that causes a DivideByZeroException exception.

using System;
public class DivideZeroTest {
 public static void Main() {
   int x = 0;
   try { 
     int y = 100/x;
   }
   catch (DivideByZeroException e) {
     Console.WriteLine("Error: {0}",e);
   }
 }
}
   

The output is

Error: System.DivideByZeroException: Attempted to divide by zero.
   at DivideZeroTest.Main()