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Java Script Array

Array is the collection of multiple values so while using array we can store multiple values in a single variable at continuous locations. Index of the array starts from 0 and goes upto size-1 of the array

In JS array may be declared as following.

var city=["Delhi","Mumbai","Chennai","Kolkata"];

Array may also be created as following

var country=new Array("India","Pak","Srilanka","Nepal");

We can access a value of array by using index as following . To store a value at given index we uses as following .In following example at 0 index “new delhi ” stores instead of delhi

city[0]="New Delhi";

To print any value at the given index we use as following.

document.write(city[2]);

Output: Chennai

length:- Length of the array may also be calculated as following

document.write(city.length);

Output: 4

Array program to print all values in reverse order

<html>
<title>JS introduction</title>
<head>
<script>
var color=["Red","Blue","Black","Green"];
for(i=color.length-1;i>=0; i--)
{
document.write(color[i]);
}
</script>
</head>
<body>
</body>
</html>

Output: Green Black Blue Red

[codepen_embed height="265" theme_id="default" slug_hash="QWwKVzJ" default_tab="js,result" user="rajputadesh"]See the Pen QWwKVzJ by rajput adesh (@rajputadesh) on CodePen.[/codepen_embed]

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