Thread: Consecutive number addition

Hi everyone,

Sorry for posting here if this is not the correct place, but I have a question I'm kinda stumped on.

I need to create a program to add together a row of numbers, something like this:

(123456789) = 45

I'm trying to figure out how to do this but am at a loss. Any ideas? thanks in advance.

How are the numbers stored? Are they supposed to be user input?

What exactly are you stuck on, writing the algorithm or the code?

--- Update ---

Thread moved from "Whats wrong with my code?"

If given a input which contains an upperbound, you could something along the lines like this:

Int UpperBound = input
Int Sum
 
For(int i; i < UpperBound; i++){
   Sum += i
}
 
Output sum

I'm sorry for the pseudo-programming language I used.. I'm on my iphone and I'm a beginner myself so I don't know the syntax on top of my head. I would give you a working example if I could but I gave you a way to work it out yourself.

Goodluck and let me know how it went.

Sorry guys, I should have been more specific. The user will input 9 consecutive numbers, and the output needs to be the sum of the numbers.

do they put in each number at a time like
1
3
4
or all at once like 5235324?

Originally Posted by derekxec

do they put in each number at a time like
1
3
4
or all at once like 5235324?

it would be all at once, as in :

123456789

the sum is 45.

So decide how you would solve the problem without a computer. Say for example someone handed you a sheet of paper with the numbers printed on it.
What steps would you take to solve the problem yourself?
Come up with your plan of attack and then implement that plan in code.
For example: Get the first number. Set total to this number.
Get the next number. Add it to the total.
Continue doing this until there are no numbers left.
etc.

Trying to provide hints without writing the code for you, but I am not exactly sure what it is you are having trouble with

I've coded your problem and I will list the steps I took so you can program it.
note that type conversions may be needed.

1. you read the number into a variable
2a. make a loop
2b. in the loop take the first digit from the variable. There's a function for that.
2c. add that digit to a sum variable
2d. do the loop 9 times
3. print out the sum.

If there's something you don't understand, or you want me to post the solution. feel free to ask.

try the pseudocode given above and make sure you get the loops right....best of luck

Sorry for my poor explanations guys. I've been working on this, and made a little progress. this is what I have so far:

import java.util.Scanner;
class Adding
{
    public static void main(String[] args)
    {
int[] scores = new int[10];
Scanner numbers = new Scanner(System.in);
System.out.println("Enter 10 numbers: ");
for (int x=0; x<scores.length; x++)
{
if (numbers.hasNextInt())
scores[x] = numbers.nextInt();
System.out.println("The total is: " + ????);
}
}
}

I'm still a little lost as to how I display the sum of the numbers. Any ideas. Thanks in advance.

If I were doing this on paper to add something up you plus one thing to another, so maybe you should try to add another variable that equals the number you just read into your array and add it to the next one in your array. I hope it helps.