QBasic 1.1: FRE Function

Explanation

Returns the amount (in bytes) of available or unused memory.

Useful and cross-version information about the programming environments of QBasic, QuickBasic and Visual Basic for DOS.

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FRE(numeric-expression)

FRE(stringexpression$)

numeric-expression

A value that specifies the type of memory:

Value	FRE returns
-1	The size of the largest array (nonstring) you can create
-2	The unused stack space
Any other number	The available string space

stringexpression$

Any string expression. FRE compacts the free string space into a single block, then returns the amount of available string space.


PRINT "String Space", FRE("")
PRINT "Unused Stack Space", FRE(-2)
PRINT "Array Space", FRE(-1)