Creating Our Own If-Then Statements

Learning Objectives Define and use boolean operators (AND, OR, NOT) to combine multiple conditions. Construct complex conditional statements using nested if-else blocks. Implement if-elif-else chains to handle multiple exclusive conditions. Write functions that encapsulate conditional logic and return a boolean value (True or False). Translate real-world rules and policies into programmatic if-then logic. Debug complex conditional statements by tracing the flow of execution. Ever wonder how a game decides if you've leveled up or unlocked a secret achievement? 🎮 It's not magic; it's custom-built if-then logic that you can create yourself! In this lesson, we'll move beyond simple checks and learn how to create our own powerful, multi-part if-then statemen...

TermDefinitionExample Boolean ExpressionA piece of code that evaluates to one of two possible values: True or False. It's the fundamental building block of any if-statement.In `age = 15`, the expression `age >= 13` evaluates to `True`. Boolean OperatorsSpecial keywords (`and`, `or`, `not`) used to combine or modify boolean expressions.`is_student and has_id_card` requires both expressions to be True. `is_weekend or is_holiday` requires at least one to be True. Nested ConditionalAn if-then statement that is placed inside another if-then statement. This allows for more complex, layered checks.First, check `if user_is_logged_in:`. If that's true, you can then check `if user_is_admin:` inside it. if-elif-else ChainA structure used to check a series of mutually exclusive condition...

Combining Conditions Pattern if (condition_A and condition_B) or not condition_C: Use parentheses `()` to group conditions and boolean operators `and`, `or`, `not` to build a single, complex logical expression. This is often cleaner than nesting multiple `if` statements. The if-elif-else Pattern if condition1: # code block 1 elif condition2: # code block 2 else: # code block 3 Use this pattern to handle a sequence of checks. The conditions are evaluated in order from top to bottom. As soon as one is found to be `True`, its code block is executed, and the rest of the chain is skipped. The Boolean Function Pattern def is_condition_met(param1, param2): # ... complex logic ... return True_or_False_result Encapsulate complex logic inside a function that returns...