# Other Functions

> [HTML Version](otherfunctions.htm)

All of the functions listed in the table below except MEM() require COMPIL /X:2 or higher. 

| | |
|------|------|
| **Function** | **Description** |
| [.ARGTYP()](argtyp_and_argsiz().htm.md) | Returns the type of the specified argument passed to the current SBX, function, or procedure. |
| .[ARGSIZ()](argtyp_and_argsiz().htm.md) | Returns the size of the specified argument passed to the current SBX, function, or procedure. |
| [.ARGTYP\_READONLY()](argtype_readonly.htm.md) | Indicates whether the specified argument is read-only.  |
| [.ARG\_PASSED()](arg_passed().htm.md) | Indicates whether the specified argument was passed to the current SBX, function, or procedure. |
| [ERR()](err_system_def.htm.md) | ERR() is used within an error trap to return information relating to an ASB error that has occurred. |
| ERRMSG() | ERRMSG(X) returns the message associated with ASB error X, based on contents of sys:errmsg.xxx.  |
| [.EXTENT()](extent().htm.md) | Returns the "extent" of the specified array or collection. See [Special ORDMAP Functions.](specialordmapfunctions.htm.md) |
| [GETKEY()](getkey().htm.md) | This function inputs a single keyboard character and returns its numeric (ASCII or Latin1) character value. |
| .ISNULL() | Tests for the .NULL condition. See [Special ORDMAP Functions.](specialordmapfunctions.htm.md) |
| .KEY() | Returns the key associated with the element currently indexed by the iterator. See [Special ORDMAP Functions.](specialordmapfunctions.htm.md) |
| MEM() | MEM(X) returns information about available memory and resources. See table of MEM(X) Values below.  |
| .NEXT() | Advances the iterator, returning the associated key or .null if no more. See [Special ORDMAP Functions.](specialordmapfunctions.htm.md) |
| [PYFUNC()](pyfunc().htm.md) | Provides a means to call an external function written in Python version 3. |
| [XFUNC(), XFUNC\$()](xfunc().htm.md) | XFUNC and XFUNC\$ execute an external SBX routine, returning a numeric or string value.  |


**MEM(X) Values**

| | |
|------|------|
| **Function** | **Description** |
| MEM(0) | returns the number of bytes of free space remaining in the "partition," which is used mostly for variable storage, expression evaluation, stack, and possibly SBX loading.  |
| MEM(1) | returns total size of "partition." See [MEMORY.LIT](memory_lit.htm.md), [MX\_MEMORY](mx_memory.htm.md)[XS](keyword-types.htm.md), and [MEMORY](memory_sp.htm.md)[SP](keyword-types.htm.md) for further discussion and methods of configuring partition size. |
| MEM(5) | size of compiled object code area |
| MEM(6) | size of DATA pool |
| MEM(7) | size of array storage area |
| MEM(8) | size of variable storage area (excluding arrays) |




**See Also**

•	[Constants ... Compiler Functions](constantsandliterals.htm.md)