How to create two dimensional array in JavaScript ?

The two-dimensional array is a collection of items that share a common name and they are organized as a matrix in the form of rows and columns. The two-dimensional array is an array of arrays, so we create an array of one-dimensional array objects.

The following program shows how to create a 2D array : 

Example 1: In this example, we will construct a two-dimensional array using integer values. 

Javascript

<script>
    // Create one dimensional array
        var gfg = new Array(2);

    document.write("Creating 2D array <br>");

    // Loop to create 2D array using 1D array
    for (var i = 0; i < gfg.length; i++) {
        gfg[i] = new Array(2);
    }

    var h = 0;

    // Loop to initialize 2D array elements.
    for (var i = 0; i < 2; i++) {
        for (var j = 0; j < 2; j++) {
            gfg[i][j] = h++;
        }
    }

    // Loop to display the elements of 2D array.
    for (var i = 0; i < 2; i++) {
        for (var j = 0; j < 2; j++)    {
            document.write(gfg[i][j] + " ");
        }
        document.write("<br>");
    }
</script>

Output:

Creating 2D array
0 1
2 3

Example 2: In this example, we will create a two-dimensional array using string values. 

javascript

<script>
    // Create one dimensional array
    var gfg = new Array(3);

    // Loop to create 2D array using 1D array
    document.write("Creating 2D array <br>");
    for (var i = 0; i < gfg.length; i++) {
        gfg[i] = [];
    }
    var h = 0;
    var s = "GeeksforGeeks";

    // Loop to initialize 2D array elements.
    for (var i = 0; i < 3; i++) {
        for (var j = 0; j < 3; j++) {

            gfg[i][j] = s[h++];
        }
    }

    // Loop to display the elements of 2D array.
    for (var i = 0; i < 3; i++) {
        for (var j = 0; j < 3; j++)

        {
            document.write(gfg[i][j] + " ");
        }
        document.write("<br>");
    }
</script>

Output:

Creating 2D array
G e e
k s f
o r G

JavaScript is best known for web page development but it is also used in a variety of non-browser environments. You can learn JavaScript from the ground up by following this JavaScript Tutorial and JavaScript Examples.