Question

show some example of few recursive problem in java language and the solution code. Need more practice as a new learner

Answer 1

Find the factorial of Code :

public class FactRec {
        private static int fact(int n) {
                // base case when we reached 0 return 1
                if (n == 0)
                        return 1;
                else
                        // multiply n with its previous number
                        return (n * fact(n - 1));
        }
        public static void main(String[] args) {
                System.out.println("Factorial of 5 is "+fact(5));
        }

}

Prints the array elements using recursion

public class ArrayRec {
        public static void main(String[] args) {
                int arr[]= {1,2,3,4,5};
                print(arr,0);
        }

        private static void print(int[] arr, int i) {
                // base case when we reached the array length than stop
                if(i==arr.length)
                        return;
                //print element
                System.out.print(arr[i]+" ");
                // move too next element
                print(arr,i+1);
        }
}

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