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Arrays in C#
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I always liked the concept of arrays. Being able to conceptually visualize in
multiple dimensions took me some time to get my mind around, but in the end I
was successful. The example here will discuss 2 dimensional arrays of type
single, multiple and jagged.
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A single dimensional array is the simplest. You simply code an object 1 column
by (n) rows. Like this image and code represent:
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int[] singleDimensionalArray = new int[2];
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| The single dimension array is of type integer with a single column
and [2] rows defined. Take note that the numbering of arrays always starts with 0
and not with one. If you wanted to access the value stored in the first row you
would use;
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int firstRow = singleDimensionalArray[0];
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| The second type of array is a multi dimensional array. It supports
(n) number of columns and (n) number of rows. You can think of this as cells
created in a spreadsheet. Like in this image:
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| And this code:
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int[,] multiDimensionalArray = new int[2, 2];
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| Again, I coded this one of type integer with a structure of 2 by 2,
I.e. [2, 2]. This means I have a table 2 columns wide by 2 rows deep. If you
needed to access the value (210) stored in [1, 0] the following would provide it:
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int multValue = multiDimensionalArray[1, 0]
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| The final type of array discussed here is called a Jagged array.
This array allows you to have arrays embeded within arrays of different length
of a single type.
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int[][] jaggedArray = new int[2][];
jaggedArray[0] = new int[4];
jaggedArray[1] = new int[7];
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| To access the value 501 stored at location [1][4] you would used this code:
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int jaggedValue = jaggedArray[1][4];
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The sample code on this website is provided to illustrate a concept and should not be used in
applications or Web sites without proper professional consultation, as it may not illustrate
the safest coding practices. I assume no liability for incidental or consequential damages
should the sample code be used for purposes other than as intended.
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