freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/basic-javascript/write-reusable-javascript-with-functions/index.md

title
Write Reusable JavaScript with Functions

Write Reusable JavaScript with Functions

Functions allow you to reuse code over and over. Our task is to make a simple reusableFunction() that prints out "Hi World" to the console (which you can reach with Ctrl + Shift + I).

You start off by using the function keyword, and then typing the function name (which follows Camel Case formatting). Then, type the (), and create the {} brackets. Like so:

function reusableFunction() {}

Now, your function is ready to be typed in. Use the console.log() to print a message in the console. The basic code solution as follows:

function reusableFunction() {
    console.log("Hi World");
}