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clear <index>   statement

Release the memory used by existing index arrays:
1. clear -1
2. clear index$ [indexID]

Syntax (1) releases the memory occupied by all existing index$ arrays. Syntax (2) releases memory occupied by the indexID array. If you omit the indexID parameter, then index$ array #0 is used.

See also
index$ statement; index$ D; index$ I; indexf; mem