This wouldn't require an array. SAS data steps loop automatically so no need to control that. You need to output multiple records per line so create a loop and use an explicit OUTPUT statement to print that line out once for each time.   In SAS arrays are used for working with multiple variables with the data on a single row, though you can across rows it's a bit more complex. It is not used to represent columns however.   Here's a tutorial on using Arrays in SAS https://stats.idre.ucla.edu/sas/seminars/sas-arrays/   ... View more