qck.hlp (Table of Contents; Topic list)
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FREEFILE Function
  Summary             Example                Contents  Index  Back
──────────────────────────────────────────────────────────────────────────────
 Returns the next valid unused file number; use to supply a file number
 when you want to ensure that the number isn't already assigned.
 
    FREEFILE
 
 See Also
    File I/O Commands                OPEN Statement (File I/O)