C# if-else Statement :

if Statement :

The main format of the conditional statements if is as follows:

Syntax :

if (Boolean expression)
{
Body of the conditional statement;
}

The Boolean expression can be a Boolean variable or Boolean logical expression. Boolean expressions cannot be integer (unlike other programming languages like C and C++).

The body of the statement is the part locked between the curly brackets ( { } ). It may consist of one or more operations (statements). When there are several operations, we have a complex block operator.

Example :

  1. /* Description: simple if program */
  3. using System;
  5. namespace DemoProgramming
  6. {
  7. class Program
  8. {
  9. static void Main(string[] args)
  10. {
  11. int myNumber = 5, OtherNumber = 4;
  13. if (myNumber == OtherNumber)
  14. {
  15. Console.WriteLine("This is same number.");
  16. }
  18. //Black Screen Cause The Condition is not true (5==4)
  19. Console.ReadKey();
  20. }
  21. }
  22. }

Output :

C Sharp Languagesimple if program

if-else Statement :

In C#, as in most of the programming languages there is a conditional statement with else clause: the if-else statement. Its format is the following:

Syntax :

if (Boolean expression)
{
Body of the conditional statement;
}
else
{
Body of the else statement;
}

Example :

  1. /* Description: simple if-else program */
  3. using System;
  5. namespace DemoProgramming
  6. {
  7. class Program
  8. {
  9. static void Main(string[] args)
  10. {
  11. int myNumber = 5;
  13. if (myNumber == 5)
  14. {
  15. Console.WriteLine("This is same number.");
  16. }
  17. else
  18. {
  19. Console.WriteLine("This is not same number.");
  20. }
  21. Console.ReadKey();
  22. }
  23. }
  24. }

Output :

C Sharp Language simple if-else program

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