Answer / ravindran

The dataset with single & is called Symbolic parameter. The
dataset with double && is called temporary dataset.

The Symbolic parameter gets the value from PROC. The
temporary datasets are created in the job flow and gets
deleted at the end of the job.

Answer / srk

symbolic param : which allow multiple users to specify their
own values to a paramaeters(specified as &paramname in
procedures) in jcl which are commonly used.

temporary data sets : data sets whose life time is till the
execution of the job itself(specified as dsn=&&datasetname
or with out specification of dsn parameter in dd statement)

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