What is the difference between
What is the default stream in v 22.0.1
getstream() is invalid syntax - it needs an object parameter (current in your example) so that it can create a reference for a new stream number that it stores centrally against that object. The stream represents a unique progression of random numbers. There's no such thing as a default stream unless you are referring to stochastic functions where the stream parameter is optional. In those cases - it's the same as any other optional numeric parameter - it will be evaluated as zero.
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