What does a DO-WHILE loop do in SAS?

A DO-WHILE loop in SAS is specifically designed to execute a series of statements as long as a specified condition evaluates to true. This means that it checks the condition before each iteration of the loop, and as long as the condition remains true, the statements inside the loop continue to execute. Once the condition becomes false, the loop terminates, and control is passed to the next statement following the loop.

This behavior allows for flexible data processing and repeated execution of a block of code based on dynamic conditions, making it a powerful construct in programming. The DO-WHILE loop is particularly useful in scenarios where the exact number of iterations is unknown beforehand, as it adapts based on the condition being evaluated during the execution of the program.