Module 4: Conditional execution

Branch your program with if, if-else, and if-elif-else, and trace which path runs.

Exam	PCEP-30-03
Section	2. Control Flow: Conditional Blocks and Loops (23% of the exam)
Objectives	2.1.1, 2.1.2, and 2.1.3
Exam questions	About 3, one per objective

By the end of this module you can do everything below. The objectives and their wording come from the official PCEP-30-03 syllabus.

2.1.1 Control program flow using if and if-else statements

• Use an if statement to execute code when a condition is true.
• Use an if-else structure to select between two execution paths.
• Construct conditions using Boolean expressions.
• Trace which branch is executed based on the result of a condition.
• Recognize when a conditional block is skipped.

2.1.2 Select among multiple execution paths using if-elif-else statements

• Use an if-elif structure to evaluate multiple conditions.
• Use an if-elif-else structure to provide a fallback execution path.
• Explain that conditions are evaluated in order until a matching branch is found.
• Trace the execution of multi-branch conditional structures.
• Recognize incorrectly ordered, redundant, or unreachable conditional branches.

2.1.3 Construct compound and nested conditional structures

• Use multiple conditional statements within the same program.
• Nest conditional statements inside other conditional branches.
• Combine Boolean expressions within conditional structures.
• Trace the execution of compound conditional structures.
• Identify unreachable, redundant, or incorrectly ordered conditional branches.