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.

For example, is this right?

(def *PI* 3.14)

Questions:

Should constants be capitalized in Clojure?

Stylistically, should they have the asterisk (*) character on one or both sides?

Any computational efficiency considerations I should be aware of?

question from:https://stackoverflow.com/questions/3579063/conventions-style-and-usage-for-clojure-constants

Answer 1

From http://dev.clojure.org/display/community/Library+Coding+Standards:

Use earmuffs only for things intended for rebinding. Don't use a special notation for constants; everything is assumed a constant unless specified otherwise.