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// For a given integer array of size N.You have to find all the occurrences (indices) of a given element(Key) and print them. Use a recursive function to solve this problem.

public class PracticeQs1 {

static void occurrence(int arr[], int key, int i) {

if (i == arr.length)

return;

if (arr[i] == key) {

System.out.print(i + " ");

}

occurrence(arr, key, i + 1);

}

public static void main(String[] args) {

int arr[] = { 3, 2, 4, 5, 6, 2, 7, 2, 2 };

int key = 2;

occurrence(arr, key, 0);

}

}