subst command in RPN mode (bug ?)

[Didier Lachieze]

(08-12-2015 08:55 PM)Marcelo Vanti Wrote:  

(08-12-2015 07:56 PM)Didier Lachieze Wrote:  "'2*Q'" Enter
"'(Q=2)'" Enter
subst(2)

it works here, indeed, if I use q (lowercase letter) rather than Q:
"2*q"
"q=2"
CAS.subst(2) ==> 4

It works as long as q is not defined. But if you create q, for ex by storing 0 to q then the subst command will return 0 as 2*q will be evaluated to 0 before the substitution can be done. To pass 2*q to the CAS for the substitution you need the single quotes inside the double quotes, or two levels of single quotes.