Arrays

Arrays are very useful in any programming language. When you use a simple variable, you can only store one value. For example age = 17 or name = “Harry”. But what if you want to store a list of related values such as all the names of members in a family? That is where arrays come in handy. Take a look at the syntax in the sample code below and make sure you watch the video on how to use arrays here, and also the video on finding the length of arrays and strings here.

<!DOCTYPE html>
<html lang="en"
<head>
 <meta charset="utf-8"/>
 <title>JavaScript - Arrays</title>
 <script type="text/javascript">
 
 // how to declare and initialise an array when you know the values
 var words = new Array("hello","hi","howdy","gday");
 
 // how to print an element from an array
 document.write(words[2]);
 
 // you can also declare an array by specifying the number of elements in the array without adding them eg.
 var pets = new Array(4);
 // and then add values later eg.
 pets[0]= "dog";
 pets[1]= "cat";
 pets[2]= "fish";
 pets[3]= "bird";
 
 // you can also start off with an empty array eg.
 
 var cars = new Array();
 
 // and then add values later
 cars[0]="Mitsubishi";
 cars[1]="Honda";
 cars[2]="Audi";
 
 // Some array hints:
 // each value is an element in an array
 // array elements are accessed using an index which starts from 0
 
 
 </script>
 
</head>
<body>
 
</body>
</html>