Java programs to find the sum and average of the numbers until 0 is entered, are given here. Suppose the input numbers are 5, 10, 9, 0, then the sum = (5 + 10 + 9) = 24 and average = (5 + 10 + 9) / 3 = 8.

## 1. Algorithm to find the sum and average of the numbers until 0 is entered

1. Set sum = 0, count = 0.

2. Take a number n as input.

3. Perform sum = sum + n.

4. Check if n = 0

5. If step 4 is true declare sum and as the sum and (sum / count) as the average of the numbers entered.

6. If step 4 is false, perform count = count + 1 and go to step 2

## 2. Pseudocode to find the sum and average of the numbers until 0 is entered

1. Procedure sumAverage():

2. sum := 0

3. count := 0

4. n := Input()

5. Repeat until n = 0

6. sum := sum + n

7. count := count + 1

8. n := Input()

9. avg := (sum / count)

10. Return sum, avg

11. End Procedure

## 3. Time complexity to find the sum and average of the numbers until 0 is entered

Time Complexity: O(n)

Here n is the number of terms.

## 4.1. Java Program to find the sum and average of the numbers until 0 is entered using iteration

Code has been copied
/************************************
alphabetacoder.com
Java program to find average and sum
of numbers until 0 is entered
*************************************/

import java.util.Scanner;

class Main {
public static void main(String args[]) {
// declare object of Scanner class
Scanner sc = new Scanner(System.in);

// declare variables
int n, count, sum;

// initialize
sum = 0;
count = -1;

// keep taking input
// until 0 is entered
do {
// take input
System.out.print("Enter a number: ");
n = sc.nextInt();

sum = sum + n;

// increment the value of number count
count++;

} while (n != 0);

// display the sum and average
System.out.println("\nTotal number entered: " + count);
System.out.println("Sum: " + sum);
System.out.println("Average: " + (double) sum / count);
}
}


Output

Enter a number: 5

Enter a number: 9

Enter a number: 8

Enter a number: 4

Enter a number: 0

Total number entered: 4

Sum: 26

Average: 6.5

## 4.2. Java Program to find the sum and average of the numbers until 0 is entered using recursion

Code has been copied
/******************************************
alphabetacoder.com
Java program to find average and sum of
numbers until 0 is entered using recursion
*******************************************/

import java.util.Scanner;

class Main {
// recursive function to find average and sum of
// numbers until 0 is entered
static void findSumAverage(int sum, int count) {
// declare object of Scanner class
Scanner sc = new Scanner(System.in);
// declare variables
int n;
// take input
System.out.print("Enter a number: ");
n = sc.nextInt();

// keep taking input
// until 0 is entered
if (n == 0) {
System.out.println("\nTotal number entered: " + count);
System.out.println("Sum: " + sum);
System.out.println("Average: " + (double) sum / count);
} else {
// add input to sum and increment count
sum += n;
count++;
findSumAverage(sum, count); // recursive call
}
}

public static void main(String args[]) {
// declare and initialize variables
int sum = 0, count = 0;

// call function to display result
findSumAverage(sum, count);
}
}


Output

Enter a number: 9

Enter a number: 12

Enter a number: 7

Enter a number: 9

Enter a number: 10

Enter a number: 3

Enter a number: 0

Total number entered: 6

Sum: 50

Average: 8.333333333333334