Conventions, Style, and Usage for Clojure Constants?

Question

What are the best practices for defining constants in Clojure in terms of style, conventions, efficiency, etc.

Answer 1

Clojure has a variety of literals such as:

3.14159
:point
{:x 0 
 :y 1}
[1 2 3 4]
#{:a :b :c}

The literals are constant. As far as I know, there is no way to define new literals. If you want to use a new constant, you can effectively generate a literal in the code at compile-time:

(defmacro *PI* [] 3.14159265358979323)
(prn (*PI*))