Adding values in a for loop

Question

I cant figure out how to add the values after it spits out the numbers. it says:

Number: 5 // I typed 5
1 2 3 4 5
The sum is.

So i need to add those number 1 2 3 4 5 but cant figure out how.

 import java.util.Scanner
 public class AddingValuesWithAForLoop
 {
      public static void main( String[] args )
      {
          Scanner keyboard = new Scanner(System.in);
          System.out.println( " \n" );

          System.out.println( "Number: " );
          int number = keyboard.nextInt();
          int sum = 0;

          for (int run=1; run<=number; run=run+1)
          {
              System.out.print( run + " " );
              sum = sum + 1 ;
          }

          System.out.println( "The sum is . " );
     }
 }

Answer 1

You need to add run to sum and then print it out, like this:

import java.util.Scanner

public class AddingValuesWithAForLoop
{
    public static void main( String[] args )
    {

        Scanner keyboard = new Scanner(System.in);
        System.out.println( " \n" );

        System.out.println( "Number: " );
        int number = keyboard.nextInt();
        int sum = 0;

        for (int run=1; run<=number; run=run+1)
        {
            System.out.print( run + " " );
            sum = sum + run; 
        }

        System.out.println( "The sum is " + sum );

    }
}

Answer 2

I believe you want sum = sum + run;

if you are wanting to sum (1, 2, 3, 4, 5) = 15.

Answer 3

well the way your doing it you will need to do keyboard.nextLine(); that will set all of your numbers to a string. Once you have all of your numbers in string you can parse through the string and set that as the scanner then do nextInt()

import java.util.Scanner
 public class AddingValuesWithAForLoop
 {
      public static void main( String[] args )
      {
          Scanner keyboard = new Scanner(System.in);
          System.out.println("Number: ");
          string numbers = keyboard.nextLine(); // 5 1 2 3 5
          Scanner theNumber = new Scanner(numbers);

          int sum = 0;

          for (int run = theNumber.nextInt(); run > 0; run--)
          {
              System.out.print(run + " ");
              sum += theNumber.nextInt();
          }

          System.out.println("The sum is: " + sum);
     }
 }

Answer 4

Fahd's answer is pretty much what you're looking for (he posted while I was typing mine). My answer just has a little bit different syntax to perform the loop and sum.

import java.util.Scanner

public class AddingValuesWithAForLoop { public static void main( String[] args ) {

    Scanner keyboard = new Scanner(System.in); 
    System.out.println( " \n" ); 

    System.out.println( "Number: " ); 
    int number = keyboard.nextInt(); 
    int sum = 0; 

    for (int run=1; run<=number; run++) 
    { 
        System.out.print( run + " " ); 
        sum += run; 
    } 

    System.out.println( "The sum is " + sum + "." ); 

} 
}

Answer 5

System.out.println( "The sum is: " + sum );

the + sum seems weird but you can use it the and a number value to a string