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Thread: Help with my Range Finder programme

  1. #1
    Junior Member
    Join Date
    Feb 2011
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    Default Help with my Range Finder programme

    hi, i'm trying to write a programme that reads two integers, and outputs the sum of all even numbers between that range e.g 10 14 = 36 (10+12+14)

    here is what i have so far, but i have messed up the calculation somewhere, any help would be greatly appreciated, thankyou

    import java.util.Scanner;
    public class Rangefinder {
         public static void main(String[] args) {
             Scanner scan = new Scanner(System.in);
            int num1, num2, min, max, amt = 0;
            System.out.println("Please enter two integers: ");
            num1 = scan.nextInt();
            num2 = scan.nextInt();
            min = Math.min(num1, num2);
            max = Math.max(num1, num2);
            for (int x = min; x <= max; x++) {
                amt = amt + x;
    Last edited by KevinWorkman; February 3rd, 2011 at 01:54 PM. Reason: added highlight tags

  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Oct 2010
    Washington, DC
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    Thanked 636 Times in 540 Posts

    Default Re: Help with my Range Finder programme

    You said you wanted to only add even numbers in the range. But you're actually adding all of the numbers in the range.

    Put a print statement inside your loop so you know what's going on. Or better yet, step through the program with a debugger.

    By the way, I've edited your post to include highlight tags. Next time you post code, make sure you use them. Nobody likes reading unformatted code.

    Heh. First moderator action. Neat.
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