Kinds of arguments

Dyalog has objects and namespaces and some other things, but we're not interested in those.

From the user's perspective, there are only two kinds of data:

• Numbers, which are complex using 64-bit IEEE binary floats for the components
• Characters, which are unicode code points (in a unicode interpreter)

Dyalog APL provides the option to use 128-bit decimal floats for real numbers instead, which makes everything really complicated.

And another thing…