Somebody explain this piece of code?

Question

int arr [ ] = new int [3] ;
(for int i = 0; i < 3; i++) {
arr [i] = i;
}
int res = arr [0] + arr [2] ;
system.out.println (res) ;

Answer 1

I guess you need the explanation for the loop block of code, here you go:

• You've created a for loop which iterates from 0 to 2 (i.e. 3 times).
• arr[i] = i; executes like:
--> when i = 0, arr[0] = 0;
--> when i = 1, arr[1] = 1;
--> when i = 2, arr[2] = 2;

And hence when you add arr[0] to arr[2], it adds (0 + 2) and stores the result (2) in variable res.

Answer 2

Thanks a ton:) I didn't think about syntax, hence the errors.... thanks:)