[Bug-apl] Determining data type...

[Peter Teeson]

I feel pretty stupid.
Looked in the APL2 IBM manual but do not understand how to determine the data 
type of a variable.
Neither the primitives nor the Quads sparked the answer in my brain. 
It must be something pretty obvious but not to me right now.

So if I have a function FOO X how do I determine if X is character, integer, 
float, or imaginary?
Assuming that it is not a nested array of course.

respect…

Peter