SYSTEM EXCEPTION

systemexception

SYSTEM EXCEPTION

            “System exception are those exception that are predefined in system library of compiler, a programmer just used it for exception handling”,

There are hundreds of system exceptions such as

n   FormatException

Exception occurs when we try to invalid conversion format such as try to change a character value to integer, double to string etc.

n  IndexOfOutRangeException

Exception occurs when the input enter value need more space then available data type space.

n  DivideByZeroException

Exception occurs when we are trying to divide any number by zero.

n  NullReferenceException

n  StackOverFlowException

n  OutOfMemoryException

These type exceptions are predefined in library, that’s why when this type of exception occurs in program due to run time error our program terminate abnormally.

For example consider this program.

1.    class Program

2.        {

3.            static void Main(string[] args)

4.          {

5.                   Console.WriteLine("enter a number");

6.                    int a = int.Parse(Console.ReadLine());

7.                    Console.WriteLine("enter second number");

8.                    int b = int.Parse(Console.ReadLine());

9.                    double c = a / b;

10.                  Console.WriteLine("the division is = {0}",c);

11.                  Console.WriteLine("end of the program");

12.                  Console.ReadKey();

13.          }

14.      }

15.   

In this simple example we can see that system exception can raise at line no. 6 that will be FormatException , line 8 also FormatException, at line no. 10 DivideByZeroException can occur, and may be same different Exception possibly occur during run time that will terminate our program at that stage without executing the next lines of, if there is no use of Exception Handling.

See more example 

Application Exception

Exception Handling