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In C#, an else-if statement consists of three parts -

• if statement with its own condition.
• else if statement with its condition.
• finally, an optional else statement, which has no condition associated with it.

Working of else-if

First the condition in the parenthesis of if is evaluated for a boolean value - true or false.

• If the condition with if statement is true then the statement or a block of statements connected to it is executed.


• If the condition with if statement is false only then the condition associated with else if is evaluated.


• If the condition with else if statement is true, then the statement or a block of statements connected to it is executed.


• But, if the condition associated with else if is evaluated to be false then the statement or a block of statements connected to the underneath else is executed. Declaring this last else statement is optional.
  
  Note:
  • Similar to its cousin Java, the C# language also requires a pair of braces { } to hold multiple statements associated with an if or else statement.
  
  

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else if statement example

//C# else if statement example

using System;

class ElseIfEx
{
public static void Main()	
{
	int a = 99, b = 100, c = 90;
	if(a>b)
		Console.WriteLine("{0} is greater than {1}", a, b);
	else if(a<c)
		Console.WriteLine("{0} is less than {1}", a, c);
	else
		Console.WriteLine("{0} is greater than {1} and less than {2}", a, c, b);
}
}

Output

99 is greater than 90 and less than 100

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