JavaScript function inside function |nested/inner example code

Can you write nested functions in JavaScript?

Yes, You can write a function inside the function in JavaScript. JavaScript supports writing a function within another function, or nested functions.

Creating a function within another function changes the scope of the function in the same way it would change the scope of a variable. This is especially important for use with closures to reduce total global namespace pollution.

Simple code snip (code structure)

JavaScript function inside function Example code

HMTL example code of nested/inner function:-

Output:

JavaScript function inside function

Note: Nested function and inner function both are the same terms used for function inside function in programming.

Do comment if you have any doubts and suggestions on this topic.

Note: All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version


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