CALCULATOR

Features

Keyboard or interface typing.
Reuse of the previous answer if start typing an operator.
Supports double negation (--).
- Example: 9--9 = 18.
Supports directly opening parenthesis (multiplication).
- Example: 9(9) = 81
Detect & prevent unbalanced parenthesis
Will not submit an unfinished statement
Won't fail on big numbers (1e+21)

Installation

Nothing to install.

Just put the files on a server for the links to work (css, js).

Browse to:

http://localhost/index.html

Tests

Browse to:

http://localhost/tests/index.html