91Ó°ÊÓ

Question: Explain a dual alternative decision structure and provide a simple example in Python. Answer: A dual alternative decision structure, also known as an 'if-else' statement, is a programming concept that performs one action if a certain condition is met and another action if it is not. It involves using 'if' and 'else' statements, and evaluates a condition that results in either True or False. For instance, let's consider a program that determines if a student passes or fails an exam based on their score. The passing score is 50. So, the condition we check is whether the student's score is greater than or equal to 50. In Python, this can be represented as: ```python if score >= 50: print("You passed!") else: print("You failed.") ``` Here, if the student's score is greater than or equal to 50 (True), the program will print "You passed!". If the student's score is less than 50 (False), it will print "You failed.". The dual alternative decision structure allows for more complex and dynamic behavior in programming by enabling decisions based on specific conditions.