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Thread: Array random numbers

  1. #1
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    Question Array random numbers

    Hi
    I was just wondering if someone could help me a bit in my java code.
    Basically what iv done is made a program that chooses 15 numbers between 1 and 100.
    I was wondering if there was an easier way of writting each array for these fifteen numbers.
    As of now i have written each code individually like this:

                //Array Numbers
                Random randomGenerator = new Random ();
                int num[] = new int[16];
                for (int idx = 1 ; idx < 16 ; idx++)
                    {
                num[idx] = (int)(Math.random()*100);
                    }
                c.println("Here are 15 random numbers between 1 and 100:");
                c.println (num[1]);
                c.println (num[2]);
                c.println (num[3]);
                c.println (num[4]);
                c.println (num[5]);
                c.println (num[6]);
                c.println (num[7]);
                c.println (num[8]);
                c.println (num[9]);
                c.println (num[10]);
                c.println (num[11]);
                c.println (num[12]);
                c.println (num[13]);
                c.println (num[14]);
                c.println (num[15]);
                    }

    The program goes work, i was just interested in finding out whether there was an easier way to put these random number.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Array random numbers

    Yes, look at using a for loop. Replace the hardcoded indexes [0] etc with [i] where i is the for loop index.

  3. The Following User Says Thank You to Norm For This Useful Post:

    nitwit3 (July 20th, 2011)

  4. #3
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    Default Re: Array random numbers

    Thank You!

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    Default Re: Array random numbers

    I have to wonder how you can think to use a loop to insert values into an array but couldn't think to use a loop to print them out.

    int num[] = new int[16];
    If you want an array to hold N number of things then create the array with a size of N. Do not create it with a size of N+1 just to avoid using index 0.
    Improving the world one idiot at a time!

  6. #5
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    Default Re: Array random numbers

    yea i know .. im not the brightest light bulb out there -____-

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