What is the function of output statement in a SAS Program

Answer 1

Writes the current observation to the SAS dataset(s) named in your DATA statement.

If there is no OUTPUT statement within the data step, SAS by default writes the observation when it encounters the end of the data step.

If you have more than one dataset on your DATA statement, you can use the OUTPUT statement to tell SAS specifically which dataset name(s) to write to.