# Dropping variables 
Sometimes in Granite, you may want to un-initalise a variable you initialised! This is easy to do.

## New operations
* `:$(variable)`, variable drop, deletes `(variable)`

## Tutorial
Look at this simple program:

```
:?x
:^x
:!x
:?x
:ax,x,x
:!x
```

This program is fairly simple, what we expect is that it will prompt the user twice and do some maths on their number!

What we _instead_ get is this:

```
? 9
10
105
10
```

This is not very nice looking as it is interpreting the users first input as a prompt.

To fix this, use `:$x` after the first print operation to drop the `x` variable!

Now your output can look like this:

```
? 9
10
? 5
10
```

Much better!

## After example
```
:?x
:^x
:!x
:$x
:?x
:ax,x,x
:!x
```