Write a Javascript code that outputs 'Hello world'.
Here is an example of a simple JavaScript code that outputs 'Hello World':

```javascript
console.log('Hello World');
```
Complete the following task based on the instruction and optional input provided.### Instruction:
Write a Javascript code that outputs 'Hello world'.

### Output:
Here is an example of a simple JavaScript code that outputs 'Hello World':

```javascript
console.log('Hello World');
```