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Thread: upcoming assignment in 2D arrays - for preparation, can someone describe the importance of a 2d array?

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    Default upcoming assignment in 2D arrays - for preparation, can someone describe the importance of a 2d array?

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    Default Re: upcoming assignment in 2D arrays - for preparation, can someone describe the importance of a 2d array?

    Arrays allow you to have one name for many values.
    Two dim arrays are usually considered as having rows and columns. Many spread sheet apps work with rows and columns. Many games use boards with rows and columns.
    Some apps map their data in x,y terms. The pixels in an image.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: upcoming assignment in 2D arrays - for preparation, can someone describe the importance of a 2d array?

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    Default Re: upcoming assignment in 2D arrays - for preparation, can someone describe the importance of a 2d array?

    Also for functionality, a for loop can be used to step through a 2d array, like this:

    for(Type[] arrayName : Type[][] otherArray){
    }

    I'm assuming you probably already know this, but just incase.

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    javaiscool (February 12th, 2013)

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    Default Re: upcoming assignment in 2D arrays - for preparation, can someone describe the importance of a 2d array?

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    Default Re: upcoming assignment in 2D arrays - for preparation, can someone describe the importance of a 2d array?

    Of course

    When we have
    for(int x : array)

    Its basically saying:
    Ok, loop through the array 'array', treating each element as x.

    So
    for(int x : array){
      x--;
    }
    would subtract 1 from every element in the array.
    Understand?
    Its basically the same for 2d arrays.

    for(int[] x : twoDArray){
      System.out.print(x.length);
    }

    The above code sample would print out the length of every row in the 2D array.

    Hpe I helped!

    - vividMario52

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    javaiscool (February 26th, 2013)

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    Default Re: upcoming assignment in 2D arrays - for preparation, can someone describe the importance of a 2d array?

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    Default Re: upcoming assignment in 2D arrays - for preparation, can someone describe the importance of a 2d array?

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