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### Java puzzle 10: A switch statement

Level: Normal

What is the output of this program and why?

public class MySwitch { public static void main(String[] args) { int x = 2; switch(x) { case 1: x += 2; break; case 2: x++; case 3: x += 4; default: x += 2; } System.out.print(x); } }

###### Author: Sar Maroof

### Answer explanation

Answer explanation

- The initial value of x is 2. So, case 1 doesn’t match the value of x.
- The statement x++; under case 2 is executed and the value of x is incremented by 1, x = 2 + 1 = 3.
- There is no break in case 2. Therefore, the statement under case 3 x += 4; is executed and the value of x becomes x = 3 + 4 = 7.
- There is no break statement in case 3. Therefore, the statement x += 2 under default is executed. The value of x is incremented by 2. x = 7 + 2 = 9.

The correct answer is 9.

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