Computer Science - Object Oriented Programming Using C++ - Discussion

Break statement in switch case is compulsory. Because without break statement all the cases will be executed.

And you can run the below program to find out why break statement is compulsory in switch statements:

#include <stdio.h>

int main () {

/* local variable definition */
char grade = 'B';

switch(grade) {
case 'A' :
printf("Excellent!\n" );

case 'B' :
case 'C' :
printf("Well done\n" );

case 'D' :
printf("You passed\n" );

case 'F' :
printf("Better try again\n" );

default :
printf("Invalid grade\n" );
}

printf("Your grade is %c\n", grade );

return 0;
}

When we don't use break; statement the switch function will show all the cases you mentioned below the first one it wouldn't break the program and go out of it.

So break statement is compulsory in that matter.

But if you want all the cases to be print then it's not.

So both compulsory and optional is right because it will still work without a break statement.

If we don\'t use break in each condition then give output all result print when execute the program. Break will give a result only One what will fulfil the condition.

Try to Run It bellow -
#include <stdio.h>

int main () {

/* local variable definition */
char grade = 'B';

switch(grade) {
case 'A' :
printf("Excellent!\n" );

case 'B' :
case 'C' :
printf("Well done\n" );

case 'D' :
printf("You passed\n" );

case 'F' :
printf("Better try again\n" );

default :
printf("Invalid grade\n" );
}

printf("Your grade is %c\n", grade );

return 0;
}

In Switch - No break is needed in the default case.

In case if one needs to exit from the current case break statement is compulsory if not it is optional.

If we don't use break in each condition then give output all result print when execute the program.

Break statement is to stop the case so it is not compulsary we can use something else to end the case.

@ALL.

Sometime it is compulsory, !we write switch statements for executing single case at a time, it is properly done by using the break statement. Without using a break statement, all statements are executed at a time so the outcome is not proper!

In the syntax also break is given know, so it may be compulsory.

Exactly, The Break statement is mandatory in switch concept.

Use of break statement in a switch statement is compulsory.