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

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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:

```javascript
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:

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