Prepare Interview

Mock Exams

Make Homepage

Bookmark this page

Subscribe Email Address

JavaScript%20Interview%20Questions%20and%20Answers

Question: What does isNaN function do?
Answer: Return true if the argument is not a number.
Example:
isNaN(123) //returns false
isNaN('Hello John') //returns true

Is it helpful? Yes No

Most helpful rated by users:

©2024 WithoutBook