Global Variables?

[Joe Horn]

(04-03-2017 12:40 AM)toml_12953 Wrote:  Is there a way to make global variables using uppercase letters?

I'd like to use N:=20;
outside a begin-end block.
I'd also like to be able to use
R:=makelist(0,100);

I get syntax errors for both.
N1:=20; and r:=makelist(0,100); both work. however.

The permanently-existing, built-in variables are "reserved" by the system and always contain specific object types. For example, A-Z always exist as global variables, and always contain a real number, and cannot be purged. That's why you can't assign a list to 'R'.

The reason 'N1' and 'r' do work in your example above is because they are not reserved variables, so they can contain any object type, or nothing at all (after being purged). A hopefully-complete list of Prime's reserved variables can be found HERE.