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Thread: How to make a integer negative if it meets a certain criteria?

  1. #1
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    Question How to make a integer negative if it meets a certain criteria?

    So I'm rookie to this stuff but I can usually read the program once I see it. Anyways I'm not sure how to make a integer negative if it meets a certain criteria.

    So in this program I'm trying make the integer negative if its less than 50. If its greater than 50 then it stays positive then add up all the values.

    Do need a while statement in here? If so how would I go about doing that?

    import java.util.Random;
    import java.util.*;

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

    int sum = 0;
    int randomInt;
    int result = 0;

    System.out.println("Generating 10 random integers in range 0 to 99.");

    Random randomGenerator = new Random();

    for (int random = 1; random <= 10; ++random) {
    randomInt = randomGenerator.nextInt(10);
    result = (int) (Math.random() * 99);
    System.out.print(result + " ");
    sum = result+sum;

    if (randomInt < 50)
    randomInt = --;
    if (randomInt > 50)
    randomInt = ++;

    }
    System.out.println();
    System.out.println("Sum = " + sum);
    }

    }
    Last edited by Deep_4; November 7th, 2012 at 09:46 PM.


  2. #2
    mmm.. coffee JavaPF's Avatar
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    Default Re: make a integer negative?

    Quote Originally Posted by Lizard
    So in this program I'm trying make the integer negative if its less than 50. If its greater than 50 then it stays positive then add up all the values.
    Can you give me an example please? So say the number is 33, you want it to output -33?
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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  3. #3
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    Default Re: make a integer negative?

    Yes so:

    -22, 56, -37, 88,....ect

    Sum: 467

    I want the output to be the sum of all the integers once their value has changed.

  4. #4
    mmm.. coffee JavaPF's Avatar
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    Default Re: make a integer negative?

    Hey Lizard,

    I have made a very slight edit to the code I helped you with previousally:

    import java.util.Random;
    import java.util.*;
     
    public final class Sum10RandomIntegers {
        public static final void main(String[] args) {
     
            int sum = 0;
            int randomInt;
            int result = 0;
     
            System.out.println("Generating 10 random integers in range 0 to 99.");
     
            Random randomGenerator = new Random();
     
            for (int random = 1; random <= 10; ++random) {
                randomInt = randomGenerator.nextInt(10);
                sum = (int) (Math.random() * 99);
     
                if(sum < 50){
                    sum = -sum;
                }
     
                System.out.print(sum + " ");
                result = result+sum;
     
            }
            System.out.println();
            System.out.println("Result = " + result);
        }
     
    }
    Example output:

    Generating 10 random integers in range 0 to 99.
    -49 86 -38 84 66 -18 95 -21 -15 -48
    Result = 142
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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  5. The Following User Says Thank You to JavaPF For This Useful Post:

    Lizard (May 14th, 2009)

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