The '''FRE''' function returns the amount of Memory available in bytes to running programs.



{{PageSyntax}}
:: memory = FRE(string_expression$)
:: memory = FRE(numerical_expression)


*'''[[Keywords currently not supported by QB64|Currently NOT supported in QB64!]]'''
* Any string expression returns the size, in bytes, of free string storage space.
* Also compacts the free string storage to a single block of memory.
*  0 returns the same value as using a string expression above.
* -1 returns the size of the largest non-string array in bytes that could be dimensioned.
* -2 returns the amount of stack space, in bytes, available to a running program. 
* Any other numerical value returns the size of the next block of string memory storage space.


''Example:''
{{CodeStart}} '' ''
' {{Cl|$DYNAMIC}}
PRINT &quot;Sizes in bytes before dimensioning arrays:  &quot;; {{Cl|FRE}}(&quot;&quot;), {{Cl|FRE}}(0), {{Cl|FRE}}(-1), {{Cl|FRE}}(-2)
{{Cl|DIM}} Array(100, 100), Text$(5000)
PRINT &quot;Sizes in bytes after dimensioning arrays:   &quot;; {{Cl|FRE}}(&quot;&quot;), {{Cl|FRE}}(0), {{Cl|FRE}}(-1), {{Cl|FRE}} (-2) '' ''
{{CodeEnd}}

''Notes:'' Sizes returned may vary by computer used. FRE(-2) must be used in a running program!


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