Can we put "greater then, less then or equal to" with switch statement??

Question

For example; can we write like this in switch statement:
switch(age){
case <=20;
cout<<"statement ";
break;
}

Answer 1

no switch statements are locked but you could have one statement fall into another

switch(a)
{
Case 10:
case 11:
case 12: cout << "in range of 10-12" << endl;
break;
case 20:
break;

}
but in practice I wouldnt use this.