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public class ArrayIntList { public static int lastIndexOf(int arr[], int key){ int res = -1; for(int i = 0;i<arr.length;i++){ if(arr[i] == key){ res = i; } } return res; } public static void main(String args[]){ int arr1[] = {1,18,2,7,18,39,18,40}; System.out.println(lastIndexOf(arr1, 18)); System.out.println(lastIndexOf(arr1, 3)); } } 6
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