Answer to Question #253675 in Java | JSP | JSF for lee

Question

Using a for loop create a program that will prompts the user for two numbers and then print out a summation list of all the between the two given numbers, starting from the small number to the big number. For negative numbers use brackets when printing the summation

Sample Run1

Enter two numbers: 1 10

Output1: Sum = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55

Sample Run2

Enter two numbers: -3 3

Output2: Sum = (-3) + (-2) + (-1) + 0 + 1 + 2 + 3 = 0

Answer 1

import java.util.Scanner;
public class App {
	/**
	 * The start point of the program
	 * 
	 * @param args
	 */
	public static void main(String[] args) {


		Scanner keyBoard = new Scanner(System.in);
		System.out.print("Enter two numbers: ");
		int n1 = keyBoard.nextInt();
		int n2 = keyBoard.nextInt();
		int sum=0;
		System.out.print("Sum = ");
		for(int i=n1;i<n2;i++) {
			sum+=i;
			if(i>=0) {
				System.out.print(i+" + ");
			}else {
				System.out.print("("+i+") + ");
			}
		}
		sum+=n2;
		if(n2>=0) {
			System.out.print(n2);
		}else {
			System.out.print("("+n2+")");
		}
		System.out.println(" = "+sum);
		
		
		keyBoard.close();
	}


}