What does isNaN function do?

What does isNaN function do?

NaN stands for ‘not-a-number’. The function isNaN determines the argument or the value is a NaN. The function returns true if the argument is not a number, otherwise returns false.
How to read and write a file using javascript?
There are two ways to do it: 1. Using JavaScript extensions (runs from JavaScript Editor), or 2. Using a web page and ActiveX objects (Internet Explorer only)...
How do you create a new object in JavaScript?
In order to generate dynamic content, JSP provides for creating, modifying and interacting with Java objects...
How to create arrays in JavaScript?
Although you can create the arrays using ‘new’ (var myArray = new myArray[10];), it is recommended that you create it in the following way: var myArray = [];...
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