Example

> class(3)
num
> class([3,-3,1;2,6,3])
num
> class("any 'ol string")
string
> class(["any 'ol string","and another","to make a string matrix"])
string
> class(<<a = 3;b = "string">>)
list
> class(sin)
function
> class(sin(3))
num
> "any 'ol string".class
string
> g = 4+3j
 g =
        4 + 3i
> g.class
num
> sin.class
function