In the above general form,

Expression:lt 15 an integer expression (or) character.

Value-1,value-2..... :These are constants (or) constant expressions (evaluable to integer constant) and are known as
"case labels". Each of these values should be unique with switch statement. block-1,block-2...:These are the
statement lists and may contain zero (or) more statements.There is no need to put braces around these blocks.
Note: "case labels" must end with a colon (:).

When the switch is executed, the value of the expression is successively compared against the values value-1,
value2.......If a case is found whose value matches with the value of the expression then the block of statements of
that particular case will get executed.

Break:The break statement at the end of each block signal the end of a particular case and causes an exit from switch
statement, transferring the control to the statement-x, following the switch.

The default is an optional case. When present it will be executed if the value of expression does not match with any
of the case values. If not present, no action takes place if all matches fail and the control goes to the statement-x.

Ex: program to test all arithmetic operations using switch statement

main( )

int a,b ,opt;

clrscr( );
printf("enterany2values");
scanf("%d%d",&a,&b);
printf("1.addition\n2.subraction\n3.multiplication\4.division\n6.modular\n");
printf("\nenteryouroption");
scanf("%d",&opt);

switch(opt)

case 1:
printf("aditionof%d&%dis%d",a,b,a+b);

break;
case

printf("subof%d&%dis%d",a,b,a-b");
break;
case 3:
printf("multipleof%d&%dis%d",a,b,a* 2);

break;