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Thread: I HAVE QUESTION ABOUT CREATING PYRAMID OF NUMBERS

  1. #1
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    Question I HAVE QUESTION ABOUT CREATING PYRAMID OF NUMBERS

    I have a problem on how to make this output:
    Output1:
    ENTER NO.OF ROW/S: 5
    1112131415
    78910
    456
    23
    1

    Output2:
    ENTER NO.OF ROW/S: 4
    78910
    456
    23
    1

    I created a code below, but the output is like this:
    Output1:
    ENTER NO.OF ROW/S: 5
    12345
    6789
    101112
    1314
    15

    Output2:
    ENTER NO.OF ROW/S: 6
    123456
    7891011
    12131415
    161718
    1920
    21

    Code:
    Scanner in=new Scanner(System.in);
    int x,y,row,num=0;
    System.out.print("ENTER NO.OF ROW/S:");
    row=in.nextInt();
    for(x=1;x<=row;x++)
    {
    for(y=x;y<=row;y++)
    {
    num++;
    System.out.print(num);
    }
    System.out.println();
    }

    I'm newbie in java programming, what should I do to make that output possible? thanks in advance.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: I HAVE QUESTION ABOUT CREATING PYRAMID OF NUMBERS

    what should I do to make that output possible
    Look at the output line by line and find the relationship between what is printed on a line, which line it is and the number of lines to be printed. When you find the relationship, then write pseudo code for an algorithm and then write the program code from that algorithm.
    You know the last line has a single 1 (1 number)
    and the next to the last line has 23 (2 numbers)
    Continue with the rest of the lines. How many numbers for how many lines? If 2 lines then 3 numbers.
    If you don't understand my answer, don't ignore it, ask a question.

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