public static int mystery(int value)
{
if(value <= 10)
return value * 3;
return value + mystery(mystery(value / 5)); // finished call 2
// call2 call 1 got back 27
// computes 15 + 27, which is 42
// stops and returns 42
}
Call stack
m(9) returns 27
m(3) returns 9
m(15) 15 + 27 returns 42
m(5) returns 15
m(27)2 27 + ____
m(9) returns 27
m(45)2 45 + ____