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C# switch-case Statement :

switch-case Statement :

The structure switch-case chooses which part of the programming code to execute based on the calculated value of a certain expression.

Syntax :

switch (expression)
{
case 1:
statements;
break;

case 2:
statements;
break;

default:
statements;
break;
}

Example :

  1. /* Description: simple switch-case program */
  3. using System;
  5. namespace DemoProgramming
  6. {
  7. class Program
  8. {
  9. static void Main(string[] args)
  10. {
  11. int number=2;
  13. switch (number)
  14. {
  15. case 1:
  16. Console.WriteLine("The 'int number' value is 1");
  17. break;
  18. case 2:
  19. Console.WriteLine("The 'int number' value is 2");
  20. break;
  21. default:
  22. Console.WriteLine("The 'int number' value is Unknown!");
  23. break;
  24. }
  25. Console.ReadKey();
  26. }
  27. }
  28. }

Output :

C Sharp Language simple nested if-else program

Rules for Expressions in Switch :

The switch statement is a clear way to implement selection among many options (namely, a choice among a few alternative ways for executing the code). It requires a selector, which is calculated to a certain value. The selector type could be an integer, char, string or enum. If we want to use for example an array or a float as a selector, it will not work. For noninteger data types, we should use a series of if statements.


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