SAS Question:
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Suppose a null dataset with 10 variables; i want to print only name of the varibales in log window and also output window. How can we do this one?

Answer:

data sm;
input name $ number;
datalines;
run;

dataset in created without observations but the dataset has
varibles.

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What is validvarname and varnum? why we are using this options; explain with a syntax for this options?What is the use of catalog?