JavaScript: Arrays
Once you've graduated from the basic variables in JavaScript the next variable you want to learn is the JavaScript array. An array is a group of variables in a list or collection. However, you want to word it. As with everything else a JavaScript array is mutable, meaning you can change it dynamically while you are working on it.
Declaring an Array
var alphabet = new Array();
alphabet [0] = 'A';
alphabet [1] = 'B';
alphabet [2] = 'C';
Declaring an Array In Literal Format
var alphabet = ['A','B','C']
Accessing Array Value
document.writeln("First Index: " + alphabet[0]);
Output:
First Index: A
Looping through an Array
for(var i = 0; i < alphabet.length;i++)
{
document.writeln("index: " + i + " value: " + alphabet[i]);
}
Output:
index: 0 value: A index: 1 value: B index: 2 value: C
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