find sum and average of n numbers
public class Solution { public static void main(String[] args) { Scanner ip = new Scanner(System.in); double input = 0; int count = 0; double sum = 0; while (input != -1) { System.out.print("Enter input:(-1 to stop): "); input = ip.nextDouble(); if (input != -1) { sum = sum + input; ++count; } } System.out.println("Averager of " + count + " numbers is " + (sum / count) + " and its sum: " + sum); ip.close(); } } OUTPUT: Enter input:(-1 to stop): 10 Enter input:(-1 to stop): 20 Enter input:(-1 to stop): 30 Enter input:(-1 to stop): -1 Averager of 3 numbers is 20.0 and its sum: 60.0