public class Ex01LastIndexOf {

	public static int firstIndexOf(int[] arr, int val) {
		for (int i = 0; i < arr.length; i++) {
			int num = arr[i];
			if (num == val) {
				return i;
			}
		}
		return -1;
	}
	
	public static int lastIndexOf(int[] arr, int val) {
		for (int i = arr.length-1; i >= 0 ; i--) {
			int num = arr[i];
			if (num == val) {
				return i;
			}
		}
		return -1;
	}
	
	public static void main(String[] args) {
		int[] nums = {74, 85, 102, 99, 101, 85, 56};
		int index = firstIndexOf(nums, 85); // 1
		System.out.println(index);
		index = lastIndexOf(nums, 85); // 5
		System.out.println(index);
		index = lastIndexOf(nums, 2); // not found
		System.out.println(index);
	}

}