JavaScript Two Dimensional Arrays
In this JavaScript tutorial you will learn about two dimensional arrays – how to define and access two dimensional array in JavaScript.
Two Dimensional Arrays in JavaScript:
Two Dimensional Arrays are storing elements in a structure similar to that of a table.
Defining Two Dimensional Arrays in JavaScript:
One of the vital points to note is JavaScript does not support multi-dimensional arrays and thereby does not support Two Dimensional Array. In order to create a Two Dimensional Array in JavaScript, the programmer must use the concept of creating the Single Dimensional Array while employing a small trick in the code.
Two-Dimensional Arrays in JavaScript are constructed by creating an array of arrays. JavaScript does not directly allow creation of a Two-Dimensional Array. Two-Dimensional Arrays in JavaScript are constructed when the inner array is created first and then, using this initial array, the outer array is then populated.
For example defining
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defines 4 storage area for the array named as Exforsys. That is
A two-dimensional array can be built by defining another array on each of Exforsys[0], Exforsys[1], Exforsys[2], Exforsys[3]
This is done as follows:
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This gives structure as follows:
This shows a two-dimensional array constructed using the single dimensional concept of arrays in JavaScript. The next step is adding elements to two-dimensional arrays using JavaScript.
The elements can be added to the two-dimensional array in JavaScript using double brackets. For example, to store elements in the above two dimensional array named Exforsys we write:
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Thus the above two dimensional array named as Exforsys has 4*4 =16 storage spaces.
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