Functions in JavaScript

Functions

Function in JavaScript is a block of code, which is designed to perform any particular task. A JavaScript function can be executed by calling or invoking it. The main idea of using function is to put commonly used task together inside a function, so that instead of writing the same code again and again for different inputs, we can call that particular function.

										    
											// Defining a function
											function functionName() {
												Statements;
											};
											
											// Calling a function
											functionName();
											
										

										    
											function sayHello() {
												console.log("Hello World !");
											};
											
											sayHello();