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9 Commands

9.1 @   Execute the following expression as M code.
9.2 !   Run an external program or command.
9.3 !!   Launch a subshell from FreeM direct mode.
9.4 ABLOCK   Increment the block counter for one or more event classes.
9.5 ASSERT   Raise error when a conditional expression evaluates false.
9.6 ASTART   Enable asynchronous event handling for one or more event classes.
9.7 ASTOP   Disable asynchronous event handling for one or more event classes.
9.8 AUNBLOCK   Decrement the block counter for one or more event classes.
9.9 BREAK   Interrupt a running routine to allow interactive debugging.
9.10 CLOSE   Close an input/output device.
9.11 CONST   Define a constant that cannot be altered after initial definition.
9.12 DO   Transfer program control to one or more subroutines or introduces a new execution level.
9.13 ELSE   Execute the remainder of a line if $TEST evaluates false.
9.14 FOR   Repeat execution of a line or block of code.
9.15 GOTO   Unconditionally transfer program execution to a supplied entryref.
9.16 HALT   Terminate the current FreeM interpreter instance.
9.17 HANG   Temporarily suspend the running program.
9.18 IF   Execute the remainder of a line if a conditional expression evaluates true.
9.19 JOB   Execute an entryref in a child process.
9.20 KILL   Remove data from a local, global, or structured system variable.
9.21 KSUBSCRIPTS   Kill only the descendant subscripts of a local, global, global, or structured system variable.
9.22 KVALUE   Kill only the value of a local, global, or structured system variable.
9.23 LOCK   Control advisory locking for concurrency control.
9.24 MAP   Map a global name to a non-default namespace.
9.25 MERGE   Merge contents of one local, global, or structured system variable into another.
9.26 NEW   Introduce a new scope for a specified local variable or intrinsic special variable or instantiate an object.
9.27 OPEN   Open a sequential or socket input/output device.
9.28 QUIT   End execution of the current process level, optionally with return value.
9.29 READ   Read input from an input/output device.
9.30 SET   Set the value of a local variable, global, intrinsic special variable, or structured system variable.
9.31 TCOMMIT   Commit a transaction.
9.32 THEN   Preserve $TEST until the end of the current line.
9.33 THROW   Programmatically raise an error condition.
9.34 TROLLBACK   Roll back all pending transactions.
9.35 TSTART   Introduce a new transaction processing level.
9.36 UNMAP   Remove a mapping of a global to a non-default namespace.
9.37 USE   Set the currently-active input/output device.
9.38 VIEW   Modify FreeM internal parameters.
9.39 WATCH   Enable or disable watchpoints, or set or clear watchpoints on specified globals, locals, or structured system variables.
9.40 WITH   Set prefix for future variable references.
9.41 WRITE   Write output to current input/output device.
9.42 XECUTE   Interpret string as M code.
9.43 ZALLOCATE   Alternative to LOCK.
9.44 ZBREAK   Unknown.
9.45 ZDEALLOCATE   Alternative to LOCK.
9.46 ZGO   Unknown.
9.47 ZHALT   Unknown.
9.48 ZINSERT   Insert code into routine buffer.
9.49 ZJOB   Unknown.
9.50 ZLOAD   Load routine into routine buffer.
9.51 ZNEW   Unknown.
9.52 ZPRINT   Print contents of routine buffer.
9.53 ZQUIT   Unknown.
9.54 ZREMOVE   Remove code from routine buffer.
9.55 ZSAVE   Save routine buffer to disk.
9.56 ZTRAP   Unknown.
9.57 ZWRITE   Write local variable, global, or structured system variable to $IO.
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