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Conditional Statements in Python
course content

Course Content

Conditional Statements in Python

Conditional Statements in Python

1. Python if Statement
Introduction to if StatementSyntax of if StatementComparison OperatorsLogical OperatorsOperators PrecendenceChallenge: Simplify Fitness Tracker Logic
2. Python if-else Statement
Syntax of if-else StatementChallenge: Step Goal ProgressChallenge: Debug and Improve Hydration Reminder CodeConditional ExpressionChallenge: Check the Password
3. Python if-elif-else Statement
Introduction to if-elif-else StatementChallenge: Workout Duration TrackerChallenge: Debugging and Improving CodeChallenge: Progress Tracker

book
Operators Precendence

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)
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Task
test

Swipe to show code editor

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.

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

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

These conditions are evaluated using nested if statements, but they can be combined into one clear and concise condition. Rewrite the code to improve its readability while keeping the same logic.

Solution

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Section 1. Chapter 5
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book
Operators Precendence

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:


              
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)
copy
Task
test

Swipe to show code editor

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.

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

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

These conditions are evaluated using nested if statements, but they can be combined into one clear and concise condition. Rewrite the code to improve its readability while keeping the same logic.

Solution

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 5
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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