$ZV[ERSION] contains a string value specifying the currently installed GT.M. $ZV[ERSION] is a space-delimited string with four pieces described below:
The M product name, for example "GT.M".
The M product version identifier; the format is: the capital letter "V" followed by the major version number, then a period (.), followed by the minor version number, then a patch number.
The host operating system name and optional version identifier; this identifier is only included if different versions of the OS support different, compatible versions of the M product.
The host hardware designation and optional chipset identifier; this identifier is only included if different versions of the hardware support different compatible versions of the M product.
M routines cannot modify $ZVERSION.
Example:
GTM> WRITE $ZVERSION
GT.M V4.3-001B VMS AXP
This example displays the current version identifier for GT.M.