Default values of declared RAPID variables?

Stupid question: if a PROC contains the following:

VAR BOOL bVar;

WHILE NOT bVAR DO:

...

ENDWHILE

What happens? I've come across this in a piece of RAPID I didn't write, but the WHILE loop executes at least once, even though bVAR is never set to True or False in between the VAR and WHILE. Now, in KUKA KRL, this would result in an "undefined variable" error, but after examining this PROC, it seems like RAPID automatically assigns False to a new Bool variable.

Am I right on this, or am I missing something? I've searched the RAPID Reference manual, but I haven't found anything that states how this works explicitly.

Is the default value for num types 0, and [[0,0,0],[1,0,0,0]] for pos types? Is there a list of these "default values" by variable type?

Quote from DS186

Check chapter 1.2.2 of the RAPID overview manual for more information.

Is there a keyword to search for? So far, none of the (several) versions of the Rapid Overview manual I have covered anything related to default values in section 1.2.2

Turns out I had 6 different Revs of that PDF. Only Rev D and above had that footnote.

I'm still a bit curious what an aggregate like robtarget gets set to in this scenario, but I guess I'll just have to experiment with that if I have a chance.

Quote from DS186

the values of p10 will be all 0, because a robtarget is just a structure of num variables.

Will it, though? The 'zero' value for a robtarget is usually [[0,0,0],[1,0,0,0]], because of the way quaternions work. It's that kind of edge case that has me curious.