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What is the Program Data Vector (PDV) and What are its
functions?
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Answer Posted / sas - user
Program data vector (pdv) is a temporary memory location.
While execution it stores the temporary values in the pdv
and after execution it displays only the final output.
For example:
do i = 1 to 10 by 2;
end;
The values of i that are stored in the pdv everytime the
loop executes are 1, 3, 5, 7, 9, 11. Everytime the
execution of the loop takes place, it over-writes the
previous value in the pdv. But at the end of execution, the
value of i is 11.
Thus pdv temporarily stores the values of i during
execution but displays the lastly over-written value.
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