C Sharp Programming/Keywords/else

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The else keyword identifies a else clause of an if statement with the following syntax:

if-statement ::= "if" "(" condition ")" if-body "else" else-body

condition ::= boolean-expression

if-body ::= statement-or-statement-block

else-body ::= statement-or-statement-block

An else clause immediately follows an if-body. It provides code to execute when the condition is false. Making the else-body another if statement creates the common cascade of if, else if, else if, else if, else statements:

using System;

public class IfStatementSample
{
    public void IfMyNumberIs()
    {
        int myNumber = 5;
        if ( myNumber == 4 )
            Console.WriteLine("This will not be shown because myNumber is not 4.");
        else if( myNumber < 0 )
        {
            Console.WriteLine("This will not be shown because myNumber is not negative.");
        }
        else if( myNumber % 2 == 0 )
            Console.WriteLine("This will not be shown because myNumber is not even.");
        else
        {
            Console.WriteLine("myNumber does not match the coded conditions, so this sentence will be shown!");
        }
    }
}

The above example only checks whether myNumber is less than 0 if myNumber is not 4. It in turn only checks whether myNumber % 2 is 0 if myNumber is not less than 0. Since none of the conditions are true, it executes the body of the final else clause.

C# Keywords
abstract as base bool break byte case catch char checked class const continue decimal default delegate do double else enum event explicit extern false finally fixed float for foreach goto if implicit in int interface internal is lock long namespace new null object operator out override params private protected public readonly ref return sbyte sealed short sizeof stackalloc static string struct switch this throw true try typeof uint ulong unchecked unsafe ushort using var virtual void volatile while
Special C# Identifiers
add alias get global partial remove set value where yield