Switch case - question

Question

How is this result 17? I don't get it:
int x = 3;
switch(x){
case 1: x+=x;
case 3: x+=x;
case 5: x+=x;
default: x+=5;
}
System.out.print(x);

Answer 1

OK, now I realize there's no "break;" statement. Now I get it. Sorry for the unnecessary question.

Answer 2

first u use the break statement . break statement break the switch case. and we get the result 6

Answer 3

Easy to miss break statements, or to miss that they aren't there when you are looking at some code you've not looked at in a while. There is one reason why you wouldn't want to put in a break - if there are some scenarios when you need additional code first, but I guess those are fairly rare (so she they do happen they could catch you out)