MEMFREE Function

MEMFREE

Returns the total amount of free memory available to BASIC programs and the operating system, in bytes.

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Examples

REM Print free memory
PRINT MEMFREE

On a 4 GB machine with 3.5 GB available, this might print:

3758096384

REM Convert to megabytes for easier reading
PRINT MEMFREE / (1024 * 1024); " MB free"

On the same 4 GB machine, this might print:

3584 MB free

REM Simple check for low memory
IF MEMFREE < (512 * 1024 * 1024) THEN
    PRINT "Warning: less than 512 MB free"
ENDIF

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Notes

• The value is in bytes, returned as a 64-bit integer.
• Represents free space across the whole system (OS + BASIC).
• Actual available memory on a “4 GB” system is typically less than 4096 MB due to hardware reservations.
• The value changes dynamically as programs allocate or free memory.

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See also: MEMUSED · MEMORY · MEMRELEASE · MEMALLOC