I will explain the basic rules for checking data types in an easy-to-understand way. In JavaScript, there are situations where you want to determine the type of data you are handling, such as whether ...

typeof is an operator that is used to identify the type of any object in javascript. It returns a value that is string. So you can compare any string value from returned value of typeof. // Examples ...

You can use typeof to check the data structure, or type, of a variable. This is useful in debugging when working with multiple data types. If you think you're adding two numbers, but one is actually a ...

How to determine if a value is a numberThere are many situations in JavaScript where you want to determine if a value is a number. In business systems, handling numbers is frequent, such as amounts in ...

Note: that name is the function//constructor name, or Annonymous, Note: name is always capital (first letter), or left as defined by the function, otherwise unexpected letter casing could go wrong.

Reason: NaN means "Not a Number," but JavaScript considers it a special value of the number data type. So, typeof NaN returns "number" because its meaning is invalid numerical result, not a separate ...