SumOrProduct.java

// Problem
// Result
// Sum or Product
// Send Feedback
// Write a program that asks the user for a number N and a choice C. And then give them the possibility to choose between computing the sum and computing the product of all integers in the range 1 to N (both inclusive).
// If C is equal to -
//  1, then print the sum
//  2, then print the product
//  Any other number, then print '-1' (without the quotes)
// Input format :
// Line 1 : Integer N
// Line 2 : Choice C
// Output Format :
//  Sum or product according to user's choice
// Constraints :
// 1 <= N <= 12
// Sample Input 1 :
// 10
// 1
// Sample Output 1 :
// 55

import java.util.Scanner;

public class SumOrProduct {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int n = s.nextInt();
        int choice = s.nextInt();
        int Sum = 0;
        int Product = 1;
        for (int i = 1; i <= n; i++) {
            if (choice == 1) {
                Sum += i;
            } else if (choice == 2) {
                Product *= i;
            }
        }
        if (choice == 1) {
            System.out.println(Sum);
        } else if (choice == 2) {
            System.out.println(Product);
        } else {
            System.out.println(-1);
        }
        s.close();
    }
}