How to check data type of any variable in jQuery?

In jQuery, you can use the 'typeof' operator to check the data type of any variable. The 'typeof' operator returns a string that represents the data type of the variable.

Here's an example:

 var myVar = "Hello, world!"; console.log(typeof myVar); // Output: "string" 

In this example, we declare a variable myVar and assign it the value of the string "Hello, world!". We then use the 'typeof' operator to check the data type of myVar, which returns the string "string".