JavaScript Tutorial - Creating two dimensional array in javascript

Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/12/creating-two-dimensional-array-in.html Healthy diet is very important both for the body and mind. If you like Aarvi Kitchen recipes, please support by sharing, subscribing and liking our YouTube channel. Hope you can help. https://www.youtube.com/channel/UC7sEwIXM_YfAMyonQCrGfWA/?sub_confirmation=1 JavaScript does not have a special syntax for creating multidimensional arrays. Instead we create an array of arrays. Example : The following JavaScript code creates a 2 dimensional 3x3 array var myArray1 = new Array(3) for (i=0; i [ 3; i++) myArray1[i]=new Array(3) myArray1[0][0] = "1" myArray1[0][1] = "2" myArray1[0][2] = "3" myArray1[1][0] = "4" myArray1[1][1] = "5" myArray1[1][2] = "6" myArray1[2][0] = "7" myArray1[2][1] = "8" myArray1[2][2] = "9" for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 3; j++) { document.write(myArray1[i][j] + " "); } document.write("[br/]"); } In Example 1, we have manually populated each storage location in the array. Instead we can use to 2 nested for loops as shown below. var myArray1 = new Array(3) for (i=0; i [ 3; i++) myArray1[i]=new Array(3) var start = 1; for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 3; j++) { myArray1[i][j] = start; start = start + 1; } } for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 3; j++) { document.write(myArray1[i][j] + " "); } document.write("[br/]"); } Performing addition between 2 two dimensional arrays in JavaScript Example : The first 3 x 3 array should contain numbers from 1 to 9 The second 3 x 3 array should contain numbers from 9 to 1 The numbers present at each index position in the first and second array should be added and the result should be stored in a third 3x3 array. // Create the first 2 dimensional 3 X 3 array var myArray1 = new Array(3) for (i=0; i [ 3; i++) myArray1[i]=new Array(3) var start = 1; for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 3; j++) { myArray1[i][j] = start; start = start + 1; } } for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 3; j++) { document.write(myArray1[i][j] + " "); } document.write("[br/]"); } document.write("[br/]"); document.write(" +"); document.write("[br/]"); document.write("[br/]"); // Create the second 2 dimensional 3 X 3 array var myArray2 = new Array(3) for (i = 0; i [ 3; i++) myArray2[i] = new Array(3) for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 3; j++) { start = start - 1; myArray2[i][j] = start; } } for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 3; j++) { document.write(myArray2[i][j] + " "); } document.write("[br/]"); } document.write("[br/]"); document.write(" ="); document.write("[br/]"); document.write("[br/]"); // Create the third 2 dimensional 3 X 3 array var myArray3 = new Array(3) for (i = 0; i [ 3; i++) myArray3[i] = new Array(3) for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 3; j++) { myArray3[i][j] = myArray1[i][j] + myArray2[i][j]; } } for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 3; j++) { document.write(myArray3[i][j] + " "); } document.write("[br/]"); } Creating a 2 dimensional 3 X 5 array var myArray1 = new Array(3) for (i=0; i [ 3; i++) myArray1[i]=new Array(5) var start = 101; for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 5; j++) { myArray1[i][j] = start; start = start + 1; } } for (var i = 0; i [ 3; i++) { for (var j = 0; j [ 5; j++) { document.write(myArray1[i][j] + " "); } document.write("[br/]"); }