Question

hi I need to understand how the out put become -4 in first question and out put 310 for the second question please can you explain to me thanks a lot 1.(ch12. Sc16. P. 820. loop) Consider the following code: import java.util.*; public class MyLoopOneSGTest{    public static void main(String[] args){      int w = 3;      System.out.println(myLoop(w));    }    public static int myLoop(int n){       int x = 1;       for (int i = 1; i < n; i++){          x = x - i;       }       x-=2;       return x;    } } What is the output of the above code? Answer: -4

(ch. 13. binary search) Consider the following class: public class MyBinarySGDemo {    public static void main(String[] args){       int[] a = {2, 4, 5, 6, 9, 10, 12};       int target = 2;       mystery(a, target);    }    public static int mystery(int[] a, int target){                                     int min = 0;       int max = a.length - 1;           while (min <= max) {          int mid = (max + min) / 2;          System.out.print(mid);          if (a[mid] == target) {             return mid;               } else if (target > a[mid]) {             min = mid + 1;            } else {                max = mid - 1;            }       }              return -1;       } } What is the output of the above code? Answer:  310

Answer 1

If you have any doubts, please give me comment...

1)

Initially x = 1;

for i=1; 1<3 true

x = 1 - 1 = 0

for i=2; 2<3 true

x = 0 - 2 = -2

for i=3; 3<3 false

x = -2-2 = -4

2)

It is a binary search

Initially min = 0, max = 6

while 0<6: true

mid = (6+0)/2 = 3

prints 3

a[3] == 2: false

max = 3-1 = 2

while 0<2: true

mid = (2+0)/2 = 1

prints 1

a[1]==2: false

max = 1-1 = 0

while 0<=0: true

mid = (0+0)/2 = 0

pirnts 0

a[0] ==2: true

return 0

So, finally prints 310