Also called a decision, one of the three basic logic structures in computer programming. The other two logic structures are Powered by www.testvitals.com 2018/11/01 07:59 sequence and loop. In a selection structure, a question is asked, and depending on the answer, the program takes one of two courses of action, after which the program moves on to the next event. This structure is sometimes referred to as an if-thenelse because it directs the program to perform in this way: If Condition A is True then perform Action X, else perform Action Y.