What's the output of the following code?public static void main(String[] args) { int[] vals = {4, 3, 2, 1}; for (int v : vals) { System.out.println(indexOf(vals, v)); }}public static int indexOf(int[] all, int element) { for (int i = 0; i < all.length; i++) { if (all[i] == element) return i; } return -1;}
Question
What's the output of the following code?public static void main(String[] args) { int[] vals = {4, 3, 2, 1}; for (int v : vals) { System.out.println(indexOf(vals, v)); }}public static int indexOf(int[] all, int element) { for (int i = 0; i < all.length; i++) { if (all[i] == element) return i; } return -1;}
Solution
The output of the code will be:
0 1 2 3
Explanation:
The main method initializes an array of integers, vals, with the elements 4, 3, 2, 1. It then iterates over each element in the array, calling the indexOf method with the array and the current element as arguments.
The indexOf method takes an array and an element as arguments. It iterates over the array, and if it finds the element in the array, it returns the index of the element. If it doesn't find the element, it returns -1.
In this case, the elements 4, 3, 2, 1 are all in the array at indices 0, 1, 2, 3 respectively. So, the output of the code is the indices of these elements, which are 0, 1, 2, 3.
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