Check the class of something in clojure?

Question

I'm learning clojure and have a very basic question: given that clojure has type inference, how can you tell what class was inferred? For instance, these would each result in different data types: ``` (2) (/ 2 3) (/ 2.0 3) ``` Is there some kind of `class` function that will return the data type? Also, is there a normal way of casting something to be a specific type? So in the second example above, what would I do if I wanted the result to be float?

Accepted Answer

There is a `type` function in the `clojure.core` library.

```
user> (type 2)
java.lang.Integer

user> (type (/ 2 3))
clojure.lang.Ratio

user> (type (/ 2.0 3))
java.lang.Double
```

If you want to convert a given number into a float then use `float`.

```
user> (float 10)
10.0
```

Check the class of something in clojure?

Solution

Problem