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Thread: Jagged array loop question

  1. #1
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    Default Jagged array loop question

    Okay I am examining a jagged array loop example from a book:

    This code creates and initializes a jagged array of integers:

    int number = 0;
    int[][] pyramid = new int[4][];
    for (int i = 0; i < pyramid.length; i++)
        pyramid[i] = new int[i+1];
        for (int j = 0; j < pyramid[i].length; j++)
            pyramid[i][j] = number++;

    This code prints it:

    for (int i = 0; i < pyramid.length; i++)
        for (int j = 0; j < pyramid[i].length; j++)
            System.out.print(pyramid[i][j] + "  ");

    They print:
    1 2
    3 4 5
    6 7 8 9

    It works, and i can see why and everything. My question concerns this line:
    pyramid[i][j] = number++;

    Why does it print 0 first?
    Shouldn't pyramid[0][0] = 1? Doesn't the loop run through the first time and set pyramid[0][0] to numbers++ (numbers = 0; numbers = numbers + 1)?

  2. #2
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    Default Re: Jagged array loop question

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