𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗙𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝘀 𝗘𝘅𝗽𝗹𝗮𝗶𝗻𝗲𝗱

𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 𝗙𝘂𝗻𝗰𝘁𝗶𝗼𝗻𝘀 𝗘𝘅𝗽𝗹𝗮𝗶𝗻𝗲𝗱

Functions are blocks of code. They perform specific tasks. You write them once and use them many times.

Functions do nothing until you call them. Calling a function means you tell the computer to run that specific code block.

Why you need functions:

• You reuse code without rewriting it.
• You organize code into small parts.
• You make your code easier to read.
• You maintain your code better.

How a function works: Functions use the function keyword. You give the function a name. You use parentheses () to hold inputs. You use curly brackets {} to hold the code.

Input and Output:

• Parameters: These are the values you send to a function.
• Arguments: These are the actual values the function receives.
• Return: This is the value the function sends back to you.

You can store the result of a function in a variable.

Example: function add(a, b) { return a + b; }

let sum = add(5, 5);

Local Variables: Variables created inside a function stay inside that function. This is called local scope.

• You cannot use a local variable outside its function.
• The computer creates the variable when the function starts.
• The computer deletes the variable when the function ends.

This keeps your code clean and prevents errors in other parts of your program.

Source: https://www.w3schools.com/js/js_function_intro.asp

Full post: https://dev.to/vidhya_murali_5aabe7784bd/functions-in-javascript-38h8