Library /sys$common/syshlp/dbg$help.hlb DEBUG, Built in Symbols, %CURVAL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies the value last displayed by an EVALUATE or EXAMINE
    command, or deposited by a DEPOSIT command. You can also use the
    backslash character (\)  for this purpose. These two symbols are
    not affected by an EVALUATE/ADDRESS command.

    Example:

    DBG> EXAMINE RADIUS
    CIRCLE\RADIUS:  0.0000000E+00
    DBG> EVALUATE %CURVAL
    0.0000000E+00