Question

• Next to these lines, write functional Java codes that will: (1) ask user to input a positive integer, such as 15; (2) create a void type of method named "findSum" that takes a parameter of int type named "n". Make sure the "findSum" method can calculate the sum of 1+2+3+ ... +n; and (3) use the "System.out.println(" to display the newly calculated sum. The following is a sample output: Enter an integer: 15 120 Enter an integer: 10 Enetr an integer: 20 210 • Capture the screen shot of your code execution and paste it to a Word document (.doc or .docx, or .pdf). [Feel free to save the Word document as.pdf file]

Answer 1

CODE:

import java.util.*; //Header file for taking input class Main //Main Class static void findSum(int n) //Method to find sum int i, sum=0; for(i=1;i<=n;i++) sum+=i; System.out.println(sum); //Printing the sum public static void main(String[] args) //Main method Scanner sc= new Scanner(System.in); //System.in is a standard input stream System.out.print("Enter the integer: "); int a= sc.nextInt(); //Taking input findSum(a); //Calling method

OUTPUT:

Enter the integer: 15 120

Enter the integer: 10 55

Enter the integer: 20 210

For any doubt please comment.