# Example of Hydrogen Usage

```kotlin
println("Hello World!") // I use the kotlin kernel
```

Kotlin allow to `html` outputs:
```kotlin
HTML("<h1>This is the Header !</h1>")
```

```python
print('Hello World!') # I use the python kernel
```

You can also use pyplot or graphical ouputs :
```python
import matplotlib.pyplot as plt

%matplotlib inline
plt.plot([2, 3, 4, 5])
plt.show()
```

```bash
hostname
```