Question

java programming!!!

Write the code fragment that will do the following: • Ask the user how many numbers they want to enter • Declare and instantiate an array of doubles with as many elements as the number entered by the user • Write one 'for' loop to fill the array with data from the user • Write a second 'for' loop to calculate the sum of all of the numbers in the array • Print the calculated sum Note: Write only the code necessary to do exactly what is being asked here. Do not copy any other code or write any code beyond what is necessary for this code fragment.

Answer 1

Dear Student,

below i have written the complete Java program as per the requirement.

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Program:

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import java.util.Scanner;

public class Sum

{

   public static void main(String args[])

   {

       //variable declaration

       int num;

       double sum = 0;

       Scanner in = new Scanner(System.in);

       System.out.println("Please enter the number of elements: ");

       num = in.nextInt();

       double [] array = new double[num];

       System.out.println("Enter the " +num+" array elements: ");

       for(int i = 0; i<num; i++)
       {
           array[i] = in.nextDouble();
       }

       //calculate the sum

       for(int i = 0; i<num; i++)
       {
           sum = sum + array[i];
       }
       //display the sum
       System.out.println("The sum of the array elements is: "+sum);
   }

}

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Sample Output:

nirmalsharma@ubuntu:~$ java Sum Please enter the number of elements: Enter the 5 array elements: 12.3 45.6 7.6 4.5 8.6 The sum of the array elements is: 78.6 nirmalsharma@ubuntu:$|

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Kindly Check and Verify Thanks..!!!