Switch statement

This is a statement that provides a way to select an expression using switch statement that evaluates the conditions using case blocks when code does not fall in any of the case blocks; then, the default block executes (default block is an optional block in switch...case statement).

Switch statement is also known as an alternative to if...else if...else statement. Let's rewrite our examples used in the previous section to showcase the if...else if...else statement:

private static void SwitchCaseExample() 
{ 
WriteLine("switch case statement example."); 
Write("Enter character:"); 
charinputChar = Convert.ToChar(ReadLine()); 
 
switch (char.ToLower(inputChar)) 
{ 
case'a': 
WriteLine($"Character {inputChar} is a vowel."); 
break; 
case'e': 
WriteLine($"Character {inputChar} is a vowel."); 
break; 
case'i': 
WriteLine($"Character {inputChar} is a vowel."); 
break; 
case'o': 
WriteLine($"Character {inputChar} is a vowel."); 
break; 
case'u': 
WriteLine($"Character {inputChar} is a vowel."); 
break; 
default: 
WriteLine($"Character '{inputChar}' is a consonant."); 
break; 
} 
}

In the preceding code, the default block will execute if none of the case evaluates to true. The switch...case statement will be discussed in detail on day three.

There is a slight difference when you're choosing between switch...case and if...else. Refer to https://stackoverflow.com/questions/94305/what-is-quicker-switch-on-string-or-elseif-on-type for more details.