In Halunke all numbers are rational. You write them as decimal numbers:

```
2
-3
2.12
```

It can answer to the following messages:

`+`

This adds two numbers.

**Example:**

```
(0.6 + 0.3) /* => 0.9 */
```

`-`

This subtracts two numbers.

**Example:**

```
(0.6 - 0.3) /* => 0.3 */
```

`/`

This divides two numbers.

**Example:**

```
(0.6 / 0.3) /* => 2 */
```

`*`

This multiplies two numbers.

**Example:**

```
(0.6 * 0.3) /* => 0.18 */
```

`<`

This compares two numbers. It is true, if the first number is smaller than the second number. Otherwise, it is false.

**Example:**

```
(0.6 < 0.3) /* => false */
```

`>`

This compares two numbers. It is true, if the first number is greater than the second number. Otherwise, it is false.

**Example:**

```
(0.6 > 0.3) /* => true */
```

`=`

This compares two numbers. It is true, if the two numbers are equal. Otherwise, it is false.

**Example:**

```
(0.6 = 0.3) /* => false */
```

`to_s`

This returns a string to represent the number in output.

**Example:**

```
(0.6 to_s) /* => "0.6" */
```

`inspect`

This returns a string to represent the number for debugging.

**Example:**

```
(0.6 inspect) /* => "0.6" */
```