JavaScript array is an object that represents a
collection of similar type of elements. We can create array in javascript. There
are 3 ways to construct array in JavaScript
1.
By array literal
2.
By creating instance of Array directly (using new
keyword)
3.
By using an Array constructor (using new keyword)
1. JavaScript
array literal
Syntax:
var arrayname=[value1,value2.....valueN];
Values are contained inside [ ]
and separated by , (comma).
Example
of creating and using Array:
The .length property returns
the length of an array.
<script>
var Student=["Vishal","Ankit","Anish"];
for (i=0;i< Student.length;i++){
document.write(Student[i] + "<br/>");
}
</script>
Output :
Vishal
Ankit
Anish
2. JavaScript Array directly (new keyword)
Syntax:
var arrayname=new Array();
Here, new keyword is used
to create instance of array.
Example:
<script>
var i;
var emp = new
Array();
emp[0] = "Anish";
emp[1] = "Ajay";
emp[2] = "Anuj";
for (i = 0; i < emp.length; i++) {
document.write(emp[i] + "<br>");
}
</script>
Output :
Anish
Ajay
Anuj
Ajay
Anuj
3. JavaScript array constructor (new keyword)
In
this method, we need to create instance of array by passing arguments in
constructor so that we don't have to provide value explicitely.
Example:
<script>
var emp = new
Array("Anuj", "Akhil", "Abhay");
for (i = 0; i < emp.length; i++) {
document.write(emp[i] + "<br>");
}
</script>
Output
:
Anuj
Akhil
Abhay
Akhil
Abhay
