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$RandomState
As of Version 6.0, 
has been superseded by the scoping construct BlockRandom.
has been superseded by the scoping construct BlockRandom.
gives a representation of the internal state of the pseudorandom generator used by Random.
Details
- The value of
changes every time Random is called. - You can use s=$RandomState to explicitly save the value of
, and $RandomState=s to restore. - The value of
is always a long integer chosen from a certain large set of possibilities. You can assign 
only to values in this set. - You can use Block[{$RandomState}, expr] to localize the value of
during the evaluation of expr.
New in 3
