Nested Conditions

Objective

Students must implement complex decision logic using nested conditionals to handle multiple interrelated conditions.

Evidence

Complex decision logic with multiple conditions:

• DeathBarrier.js - Grace period + collision check with nested conditions
• Ghost.js - Nested conditions for direction and movement logic

Implementation Details

• Conditions nested inside other conditions
• Evaluates multiple related criteria
• Outer condition gates inner conditions
• Prevents unnecessary evaluation with logical operators

Example Patterns

• Check if entity exists, then check if collision occurred
• Check if grace period active, then check if collision valid
• Check if player in range, then check direction and speed

Key Concepts

• Nested if/else blocks
• Guard clauses to reduce nesting depth

• Logical operators (&&,

  ) to simplify conditions

• De Morgan’s Laws for simplifying complex expressions
• Readability vs performance trade-offs