C# Language Conditional Statements Switch statements
Example
A switch statement allows a variable to be tested for equality against a list of values. Each value is called a case, and the variable being switched on is checked for each switch case.
A switch statement is often more concise and understandable than if...else if... else.. statements when testing multiple possible values for a single variable.
Syntax is as follows
switch(expression) {
case constant-expression:
statement(s);
break;
case constant-expression:
statement(s);
break;
// you can have any number of case statements
default : // Optional
statement(s);
break;
}
there are sevaral things that have to consider while using the switch statement
- The expression used in a switch statement must have an integral or enumerated type, or be of a class type in which the class has a single conversion function to an integral or enumerated type.
- You can have any number of case statements within a switch. Each case is followed by the value to be compared to and a colon. The values to compare to have to be unique within each switch statement.
- A switch statement can have an optional default case. The default case can be used for performing a task when none of the cases is true.
- Each case has to end with a
breakstatement unless it is an empty statement. In that case execution will continue at the case below it. The break statement can also be omitted when areturn,throworgoto casestatement is used.
Example can be given with the grades wise
char grade = 'B';
switch (grade)
{
case 'A':
Console.WriteLine("Excellent!");
break;
case 'B':
case 'C':
Console.WriteLine("Well done");
break;
case 'D':
Console.WriteLine("You passed");
break;
case 'F':
Console.WriteLine("Better try again");
break;
default:
Console.WriteLine("Invalid grade");
break;
}
