Final answer:
The IF-THEN-ELSE structure is known as a conditional structure in programming, which facilitates decision-making based on whether a condition is met.
Step-by-step explanation:
The IF-THEN-ELSE structure in programming is known as a conditional structure. This logic structure allows the program to execute certain pieces of code based on whether a condition is true or false. It can be seen as a basic decision-making process within a program. For example, using the words 'if' and 'then' helps to establish a cause-and-effect relationship in code, similar to making valid inferences in reasoning.
If a specified condition is met (if part), then the program executes one set of instructions (then part). Otherwise, if the condition is not met, the program proceeds to execute a different set of instructions (else part). This allows for the writing of flexible and dynamic code that can adapt to different situations and inputs.