Problem Statement

Programming languages have different ways of expressing floating-point literals.

Show how floating-point literals can be expressed in your language: decimal or other bases, exponential notation, and any other special features. You may want to include a regular expression or BNF/ABNF/EBNF defining allowable formats for your language.

Let's start with the solution:

0.0
0.1
-0.1
1.2e3
1.3e+3
1.2e-3