Question

JAVA: Write a method to computes the sum of all positive values in the array parameter. use Recursions only, all loops are not allowed.

Answer 1

//SumPositiveValuesArray.java
public class SumPositiveValuesArray {
    public static int sumPositives(int a[], int start){
        if(start>=a.length){
            return 0;
        }
        else{
            if(a[start]>0){
                return a[start]+sumPositives(a,start+1);
            }
            else {
                return sumPositives(a, start + 1);
            }
        }
    }

    public static void main(String[] args) {
        int arr[] = {3,2,-5,1,-4};
        System.out.println(sumPositives(arr,0));
    }
}

6