Introduction to Functions

In JavaScript, functions are the building blocks of code. They allow us to encapsulate reusable blocks of code that perform a specific task. Functions are an essential part of JavaScript programming and play a vital role in simplifying our code and making it more organized.

To define a function in JavaScript, we use the function keyword followed by the function name and any parameters the function accepts. The code to be executed is enclosed in curly braces {}, and a return statement can be included if the function needs to return a value.

Here's an example that defines a function called greet that accepts a name parameter and logs a greeting message to the console:

1function greet(name) {
2  console.log(`Hello, ${name}!`);
3}
4
5// Call the greet function
6// Output: Hello, John!
7greet('John');

Functions are the backbone of JavaScript programming, and understanding how they work is essential for any developer.

xxxxxxxxxx

// Introduction to Functions

​

// Functions are the building blocks of JavaScript

// They are reusable blocks of code that perform a specific task

​

// Syntax:

// function functionName(parameters) {

//   // code to be executed

//   // return statement (optional)

// }

​

// Example:

function greet(name) {

  console.log(`Hello, ${name}!`);

}

​

greet('John');