Question

Assume that you have an array of integers named arr. Which of these code segments print the same results? int i = 0; while (i &lt; arr.length) { System.out.println(arr[i]); i++; } int i; for (i = 0; i <= arr.length; i++) { System.out.println(arr[i]); } for (int i : arr) { System.out.println(i); }

Answer 1

Answer:

2.    int i; for (i = 0; i <= arr.length; i++) { System.out.println(arr[i]); }

3. for (int i : arr) { System.out.println(i); }

second and third code segments print the same output.

Explanation:

In first code segment, while loop starts printing from arr[0] and it continues till the second last element of the the array as in statement of while loop i<arr.length. Which print till arr[length - 1].

In second code, for loop starts from 0 and ends at the last element of the array. which prints from arr[0] to arr[length].

In third code segment, it also print from arr[0] to arr[length]. In this case      for (int i : arr)  means start from first value of array and continues till last element of the array.