C++switch statement 



In C++, a switch statement is a control flow statement .

that allows you to test a variable against a series of constant values and execute different code blocks based on whichconstant value matches the variable. 

The syntax of a switch statement is as follows:

6

java code


switch

(variable_expression)

 { 

case constant_value1:

 // code to execute if variable equals constant_value1 break;

 case constant_value2: 

// code to execute if variable equals constant_value2 break; 

// more cases can be added here default: 

// code to execute if variable does not match any of the constant values break; 

} 


Here, variable_expression is the expression whose value is to be tested against the constant values, and case statements represent the constant values that the variable_expression can match. 

If variable_expression matches a case statement, the corresponding code block is executed. 

The break statement is used to exit the switch statement after executing the code block for the matched case statement.


The default case is optional and is executed when variable_expression does not match any of the constant values. 

It is typically used to provide a fallback or error-handling mechanism.


Note that in C++, the variable expression in the switch statement can only be of integer type, character type, or an enumeration type.