Switch case in cpp

Switch case in cpp is condition statement in cpp

Switch statement is multiple decision making statement.

It tests variable with the equivalent value which is called as case.This case must be constant integer.

Switch case :  this switch statement which contains multiple branch statements.Its checks with each value. each value is called as the case. if this case true then statement in this case is executed.

Syntax for switch case 

switch(expression)

{

case value:

// statements.

break;

case value:

// statements.

break;

default:

//statements

break;

}

Switch contains case and it’s statements of any value case is true then statement in case is executed

and (if we not written break )after that all case with their statement are also get executed is called fall through.

we write break after each case because we do not need to execute rest of the cases(to avoid fall through).

default case in switch statement is not compulsory.it is used for case which is not present.

switch case Example

switch (1){

case 1:

cout<<“switch case”;

break;

default:

cout <<“default”;

break;

}

Switch case program in cpp

Output :

Program description

1. In above program we written switch statement to check user choice.

2. First we take input from user in ch variable.

=> ch = 2

3. Next switch case executed.

4. First it checks case 1 with ch = 2

=>  case 1 => 1 = 2 condition false and switch case 1 not executed

=>  case 2 =>2 = 2 condition true

5. and case 2 executed.

cout<<“number is 2″;

=> number is 2

6. At last print message

=>  cout<<” \nswitch case executed “;