Python If and If-Else: Conditions, Branches, and Indentation

All flashcards

What is a condition?

A condition is an expression that evaluates to `True` or `False`. Its result determines which statements a decision structure executes.

What are the parts of an if statement?

An if statement consists of the `if` keyword, a condition, a colon, and an indented body of statements.

How can a Boolean variable be used in an if statement?

Use it directly as the condition, such as `if is_raining:`. This is clearer than comparing it with `True`.

What does an else branch do?

It provides an alternative body that runs when the matching if condition is false. The `else` keyword aligns with `if`, while its body is indented.

What temperature formulas are used for Fahrenheit and Celsius?

Convert Fahrenheit to Celsius with $(F - 32) \times \frac{5}{9}$. Convert Celsius to Fahrenheit with $C \times \frac{9}{5} + 32$.

Quiz questions

1. In Python, what kind of value does a condition evaluate to?Answer: A Boolean value
2. When an `if` condition is false and there is no `else` branch, what happens to the `if` body?Answer: Python skips it and continues after the `if` statement.
3. How is `else` aligned relative to its matching `if` statement?Answer: At the same indentation level
4. In an `if-else` structure, how many of its two branch bodies run for a given condition result?Answer: Exactly one branch body