Can we write an OR operator into a switch case? See description below

Question

int a=2;
switch (a) {
case 1||2 : cout<< ....
case 3||4 : cout<< ...
Is sth like this possible?

Answer 1

No you can not.
to achieve that result you could do
case 1:
case 2: cout<<...;
break;
case 3:
case 4: cout<<...;
break;
whenever you don't use break; on a case, it does not terminate the switch and just moves on to the next test. that way you get the desired "or" effect.