Answer Posted / ravi

This is nothing but a implict variable created by SAS during
data processing. It gives the total number of records SAS
has iterated in a dataset. It is Available only for data
step and not for procs.

Eg. If we want to find every third record in a Dataset then
we can use the _n_ as follows
Data new-sas-data-set;
Set old;
if mod(_n_,3)= 1 then;
run;
Note: If we use a where clause to subset the _n_ will not
yield the required result.

If you were told to create many records from one record, show how you would do this using array and with proc transpose?

1538

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1214

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1154

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Do you need to compute new variables? If so,should you do this before you execute the report-writing procedure?

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Of all your work, where have you been the most successful?

4712

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1110

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How do you use the do loop if you don’t know how many times you should execute the do loop?

1295

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Explain how you can debug and test your SAS program?

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