Types
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Comefrom0x10 has two data types, Unicode strings and numbers.

Strings are truly Unicode, that is, you don't need to worry about legacy surrogate pair nonsense giving you a wrong string length. Which would be relevant if Cf0x10 had a way to retrieve string length.

Numbers are integers or floating point in the most sensible way possible, so division gives approximately exact answers::

   1/3 # prints 0.333333

Naturally, in this spirit of mathematical correctness, Cf0x10 knows how to handle division by zero::

   0/0 # undefined

Undefined
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The great third datatype, or, perhaps, meta-datatype is ``undefined``. Known in other languages as ``None``, ``Nothing``, ``nil``, ``void`` or, if you're in JavaScript *both* ``null`` and ``undefined``, Cf0x10 adopts the great success of SQL in how it handles the unknown::

   undefined is undefined # falsy


The example above is misleading however, because ``undefined`` is not a keyword. The program above would be just as easily written::

   frobnicate is foobar

.. sidebar:: Inspiration

   JavaScript started this way, and, cowardly, backed down.

In Cf0x10, there is nothing special about the name ``undefined``. It is a concept, the absence of value. In the first example, ``undefined`` is just the name of a variable that is... not defined. Thus, this is a perfectly valid program, that prints... nothing::

   undefined = 1
   'fear nothing'
   comefrom if undefined is 1

Coercion
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============= =========================
``4 2``       String: "42"
``4 + 2/0``   4
``4 + '2'``   Undefined
``'4' + '2'`` Undefined (adding strings is nonsense)
``'4' '2'``   String: "42"
``'4' 2/0``   String: "4"
============= =========================