Program code with solve function

[Gene222]

Can someone confirm the following?

1. In the previous post, the line gX := 'gX' simply converts the variable gX into a symbolic variable. Is this an accurate statement?

2. In the program below, the variable noX is a purge variable that "does not exist". Is the variable noX just a symbolic variable within the confines of the solve function?

Code:

LOCAL gX,gY,gAns;
EXPORT rooty2()
BEGIN
  gY:=1.5;
  gAns := CAS.solve("gY = 3*noX^2 - 2*noX - 4, noX");
  PRINT(gAns);
END;

My apologies if this is covered in the user guide.