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Array in javascript-tutorial

In JavaScript, an array is a special data structure used to store multiple values in a single variable.
Arrays help organize related data and make it easy to manage lists, collections, and dynamic data.

Ways to Create an Array in JavaScript

JavaScript offers three main ways to create arrays

Array Literal Notation

Using the new keyword directly

Using Array Constructor with new keyword

Array Literal Notation

This is the simples and most common way to create an array.

Syntax:

var arrayName = [value1, value2, ..., valueN];

Example:

<!DOCTYPE html>
<html>

<body>
    <script>
        var emp = ["Praveen", "Prashanth", "Sagar"];
        for (var i = 0; i < emp.length; i++) {
            document.write(emp[i] + "<br/>");
        }
    </script>
</body>

</html>

Output

Array Directly (using new keyword)

You can create an array instance using the new keyword.

Syntax:

var arrayName = new Array();

Example:

<!DOCTYPE html>
<html>

<body>
    <script>
        var emp = new Array();
        emp[0] = "Arun";
        emp[1] = "Varun";
        emp[2] = "John";

        for (var i = 0; i < emp.length; i++) {
            document.write(emp[i] + "<br/>");
        }
    </script>
</body>

</html>

Output

Array Constructor (using new keyword)

You can also pass elements as arguments to the constructor.

Syntax:

var arrayName = new Array(value1, value2, ..., valueN);

Example:

<!DOCTYPE html>
<html>

<body>
    <script>
        var emp = new Array("Jai", "Vijay", "Smith");
        for (var i = 0; i < emp.length; i++) {
            document.write(emp[i] + "<br/>");
        }
    </script>
</body>

</html>

Output

Tip: Arrays in JavaScript can hold mixed data types like numbers, strings, objects, and even other arrays, making them very flexible.