Course Content

Conditional Statements in Python

1. Mastering Python if Statements

Introduction to Python if Statements Python if Statement Syntax Using Comparison Operators in Python Logical Operators in Python Operator Precedence in Python Challenge: Simplifying Fitness Tracker Logic

2. Mastering Python if-else Statements

Python if-else Statement Syntax Challenge: Tracking Step Goal Progress with if-else Statements Challenge: Debugging and Improving a Hydration Reminder Code Using Conditional Expressions in Python Challenge: Implementing a Password Checker with if-else Logic

3. Mastering Python if-elif-else Statements

Introduction to Python if-elif-else Statements Challenge: Implementing a Workout Duration Tracker with if-elif-else Challenge: Debugging and Improving Code Logic Challenge: Building a Progress Tracker Using if-elif-else Statements

Operator Precedence in Python

When developing a Python application, it's important to understand how Python handles operator precedence, which determines the order in which operations are performed in expressions. This ensures that conditions are evaluated correctly. Using parentheses can also help clarify and control the order of operations.

Logical Operator Precedence

Among logical operators, Python follows this precedence:

Example: Fitness Tracker Goals

Let's clarify with examples in the context of a Fitness Tracker:


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# Example 1: AND has higher precedence than OR
steps_taken = 8000
step_goal = 10000
calories_burned = 450
calorie_goal = 500

first_result = steps_taken >= step_goal or calories_burned >= calorie_goal and False
# Same as: steps_taken >= step_goal or (calories_burned >= calorie_goal and False)

# Example 2: Parentheses change the precedence
second_result = (steps_taken >= step_goal or calories_burned >= calorie_goal) and False

# Example 3: NOT has the highest precedence
third_result = not (steps_taken >= step_goal) or calories_burned >= calorie_goal
# Same as: (not (steps_taken >= step_goal)) or (calories_burned >= calorie_goal)

print('The first expression is:', first_result)
print('The second expression is:', second_result)
print('The third expression is:', third_result)

Task

Swipe to start coding

In the current Fitness Tracker code, multiple nested if statements make the logic harder to read and maintain. Your task is to rewrite the code using a single, concise if statement with logical operators. Use the and logical operator to combine multiple conditions.

Fitness goals should be tracked efficiently, and so should your code! The current implementation checks if:

The user hasn't met their step goal.
The user hasn't burned enough calories.
The user didn't exercise in the morning.

Rewrite the code to improve its readability while keeping the same logic.

Solution

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 1. Chapter 5

Operator Precedence in Python

Logical Operator Precedence

Among logical operators, Python follows this precedence:

Example: Fitness Tracker Goals

Let's clarify with examples in the context of a Fitness Tracker:


              12345678910111213141516171819
            
# Example 1: AND has higher precedence than OR
steps_taken = 8000
step_goal = 10000
calories_burned = 450
calorie_goal = 500

first_result = steps_taken >= step_goal or calories_burned >= calorie_goal and False
# Same as: steps_taken >= step_goal or (calories_burned >= calorie_goal and False)

# Example 2: Parentheses change the precedence
second_result = (steps_taken >= step_goal or calories_burned >= calorie_goal) and False

# Example 3: NOT has the highest precedence
third_result = not (steps_taken >= step_goal) or calories_burned >= calorie_goal
# Same as: (not (steps_taken >= step_goal)) or (calories_burned >= calorie_goal)

print('The first expression is:', first_result)
print('The second expression is:', second_result)
print('The third expression is:', third_result)

Task

Swipe to start coding

Fitness goals should be tracked efficiently, and so should your code! The current implementation checks if:

The user hasn't met their step goal.
The user hasn't burned enough calories.
The user didn't exercise in the morning.

Rewrite the code to improve its readability while keeping the same logic.

Solution

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 1. Chapter 5

Switch to desktop for real-world practiceContinue from where you are using one of the options below