Examples of Javascript array types and usage.

JavascriptArrayUsage.js

// Javascript Arrays
// Dr. Steven B. Combs, coding novice

// Define array
var languages = ["HTML", "CSS", "JavaScript", "Python", "Ruby"];

console.log(languages[2]); // Print third item in array
console.log(languages.length); // Print number of items in array

// Print contents of array a line at a time
for (var i = 0; i < languages.length; i++){
    console.log(languages[i]);
}

// Define 2D array
var newArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]];

// 3D array positioning
// 	1	2	3
// 	4	5	6
// 	7	8	9

// Define jagged array
var jagged = [[1, 2], [3, 4, 5], [6, 7, 8, 9]];

// Jagged array positioning
// 	1	2
//	3	5	5
//	6	7	8	9