9c3a3d9f_Basic_CLIST_commands__Its_USE
[S.No] 63 [Clist Command] &SYSSYMDEF [Its USE] 
&SYSSYMDEF(symbol_name) returns the value represented by the variable "symbol_name" as specified in SYS1.PARMLIB member IEASYMxx on the SYSDEF ... SYMDEF statement. Or, the 'string' can also be one of the system static or dynamic symbols as defined in OS/390 MVS Initialization and Tuning Reference.
Basic CLIST commands
Its USE