Solution needed

Question

int x=4;
do{
switch(x){
case 4:
case 5:
break;
default:
System.out.print(x);
}}
while(++x<8);

in mcq challenge part it shows 67 as answere.
but how?
any explanation?

Answer 1

It has switch block inside a do while loop.
For x = 4 and 5 , nothing outputs because case 4, 5 have no statement except break. It had fall through.

And for x = 6 , 7 : prints 6 , 7 by default case
8<8 false so loop gets terminated.
when a case is matched and the case has no break then falls to next case irrespective of matching.