Question

In this lab, you complete a partially written Java program that includes two methods that require a single parameter. The program continuously prompts the user for an integer until the user enters 0. The program then passes the value to a method that computes the sum of all the whole numbers from 1 up to and including the entered number. Next, the program passes the value to another method that computes the product of all the whole numbers up to and including the entered number. The source code file provided for this lab includes the necessary variable declarations and the input statement. Comments are included in the file to help you write the remainder of the program. Instructions Ensure the file named SumAndProduct.java is open. Write the Java statements as indicated by the comments. Execute the program by clicking "Run Code." // SumAndProduct.java - This program computes sums and products. // Input: Interactive. // Output: Computed sum and product. import java.util.Scanner; public class SumAndProduct { public static void main(String args[]) { Scanner s = new Scanner(System.in); int number; String numberString; System.out.println("Enter a positive integer or 0 to quit: "); numberString = s.nextLine(); number = Integer.parseInt(numberString); while(number != 0) { // call sums() method here // call products() method here System.out.println("Enter a positive integer or 0 to quit: "); numberString = s.nextLine(); number = Integer.parseInt(numberString); } System.exit(0); } // End of main() method. // Write sums() method here. // Write products() method here. } // End of SumAndProduct class.

Answer 1

import java.util.Scanner;

class SumAndProduct {

    static int sums(int x) {
        int ans = 0;
        for (int i = 1; i <= x; i++) {
            ans += i;
        }
        return ans;
    }

    static int products(int x) {
        int ans = 1;
        for (int i = 1; i <= x; i++) {
            ans *= i;
        }
        return ans;
    }

    public static void main(String args[]) {
        Scanner s = new Scanner(System.in);
        int number;
        String numberString;
        System.out.println("Enter a positive integer or 0 to quit: ");
        numberString = s.nextLine();
        number = Integer.parseInt(numberString);
        while (number != 0) {
            // call sums() method here
            int sum = sums(number);
            int prod = products(number);
            System.out.println("Sum = "+sum+" , Prod = "+prod);
            // call products() method here
            System.out.println("Enter a positive integer or 0 to quit: ");
            numberString = s.nextLine();
            number = Integer.parseInt(numberString);
        }
        // System.exit(0);
    }
    // End of main() method.
    // Write sums() method here.
    // Write products() method here.
    // }
    //
}

OUTPUT :

:rogram Files Java ljdk1.8.0 131Ibinljava" Enter a positive integer or 0 to quit: Sum= 15 , Prod= ї20 Enter a positive integer or 0 to quit: Sum-21 , Prod720 og 0 to Enter a positive integer or 0 to quit: 7 Sum-28, Prod 5040 Enter a positive integer or 0 to quit: 回 2 Process finished with exit code 0