What is the output this code? Explain.

Question

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

should output 17.
case 3 is a match, but it falls through to case 5 and then to the default case since none of them have break; statements.

Answer 2

17
x is 3, so "case 3" is run.
x += x is equal to: 3 + 3 = 6.

There is no break statement, so the next case will run as well.
x += x is equal to: 6 + 6 = 12.

There is no break, so the next case will run (the default case).
x += 5 is equal to: 12 + 5 = 17.