Conditional Statements

Conditional statements allow your programs to make decisions. They let you execute different blocks of code based on whether a condition is true or false.

The Logic Flow

The if Statement

The simplest form of decision making is the if statement.

if ... else

Use else to specify what should happen if the condition is False.

if ... elif ... else

Use elif (else if) to check multiple conditions.

The Ternary Operator

Python has a one-line shortcut for simple if-else statements. This is called a Conditional Expression.

value_if_true if condition else value_if_false

Nested Conditionals

You can put if statements inside other if statements.

Logical Operators in Conditions

You can combine conditions using and, or, and not.

Truthy and Falsy Values

In Python, some values are considered "Falsy" when evaluated in a boolean context:

• False
• None
• 0 (zero)
• "" (empty string)
• [] (empty list)

Everything else is "Truthy".

Practical Examples

1. Rock, Paper, Scissors

2. Ticket Price Calculator

Quiz

Key Takeaways

✅ Use if, elif, and else for decision making
✅ Ternary Operator: x if condition else y
✅ Indentation is critical in Python
✅ Falsy values: 0, "", None, [], False
✅ Comparison operators: ==, !=, <, >, <=, >=

What's Next?

In the next lesson, we'll learn how to repeat code using:

• while loops
• for loops
• Iterating over sequences

Keep coding! 🚀