Thread by @codewithhajra

What is function and why do we use it?
- Local and Global variables in JavaScript.

A small thread🧵👇

- A JavaScript function is a block of code designed to perform a particular task. It allows us to write more maintainable code. Define the code once, and use it many times. You don’t need to write the same code over and over again.

- It is defined with the function keyword, followed by a name and parentheses (). The code to be executed by the function is placed inside curly brackets: {}
- A JavaScript function is executed when "something" invokes it (calls it).

What are Parameters and Arguments?

Parameters: These are the list of variables used in the parentheses( ) while declaring a function.

Arguments: These are the list of values we pass into the function when we make a function call.

Local and Global variables:

Local Variable: Variables that are declared within or inside a function block are known as Local variables.
- These variables can only be accessed within the function in which they are declared.
- Scope is limited.

Global Variable: Variables that are declared outside of all the functions or blocks and can be accessed globally in a program.
- It can be accessed by any function present in the program.
- They are useful if all the functions are accessing the same data.

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Happy Learning.🌸