Java Program to Add n Numbers

This post covers a program in Java that will find and print the sum of n numbers entered by user at run-time of the program.

Find Sum of n Numbers without Array in Java

The question is, write a Java program to find the sum of n numbers. The value of n and n numbers must be received by user at run-time. The answer to this question, is the program given below:

import java.util.Scanner;

public class fresherearth
{
   public static void main(String[] args)
   {
      int n, i, num, sum=0;
      Scanner scan = new Scanner(System.in);
      
      System.out.print("Enter the Value of n: ");
      n = scan.nextInt();
      System.out.print("Enter " +n+ " Numbers: ");
      for(i=0; i<n; i++)
      {
         num = scan.nextInt();
         sum = sum + num;
      }
      
      System.out.println("\nSum = " +sum);
   }
}

The sample run of above program with user input 3 as value of n and 50, 60, 70 as three numbers, is shown in the snapshot given below:

Find Sum of n Numbers using Array in Java

This program uses array to do the same job as of previous program. That is, to find and print the sum of n given numbers:

import java.util.Scanner;

public class fresherearth
{
   public static void main(String[] args)
   {
      Scanner scan = new Scanner(System.in);
      
      System.out.print("Enter the Value of n: ");
      int n = scan.nextInt();
      int[] arr = new int[n];
      System.out.print("Enter " +n+ " Numbers: ");
      for(int i=0; i<n; i++)
         arr[i] = scan.nextInt();
      
      int sum = 0;
      for(int i=0; i<n; i++)
         sum += arr[i];
      
      System.out.println("\nSum = " +sum);
   }
}

This program produces the same output as of previous program.

Same Program in Other Languages

Java Online Test

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