beginner#javascript#functions
Introduction to JavaScript Functions
Learn how to create and use reusable functions in JavaScript.
Introduction to JavaScript Functions
Functions are reusable blocks of code that perform a specific task.
Step 1: Defining a Function
In JavaScript, you can define a function using the function keyword.
function greet(name) {
console.log(`Hello, ${name}!`);
}
Step 2: Calling a Function
To use a function, you need to call it by its name, followed by parentheses containing any arguments.
function add(x, y) {
return x + y;
}
let result = add(5, 10);
console.log(result);
Step 3: Working with Function Arguments
Functions can take any number of arguments, which are passed to the function when it's called.
function calculateArea(length, width) {
return length * width;
}
let area = calculateArea(10, 20);
console.log(area);
By following these steps, you can create and use reusable functions in JavaScript.