Kursinnehåll

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

Using Conditional Expressions in Python

In Python, sometimes we need to assign different values to a variable based on specific conditions. While this can be done using the standard if-else statement, there's a more compact and elegant way to achieve it—using a ternary operator, also known as a conditional expression. This allows us to write conditional logic in a single line of code.

The syntax for the ternary operator is as follows:

python

This syntax evaluates the condition, and if it's True, it assigns the true_value; otherwise, it assigns the false_value.

Example 1: Standard `if-else` Statement

Let's say we want to assign a fitness status to a user based on the number of steps they've walked.


              123456789
            
steps_taken = 8500
status = ""

if steps_taken >= 10000:
    status = "Goal Reached"
else:
    status = "Keep Going"

print(status)

Example 2: Using Ternary Operator

We can achieve the same result using the ternary operator in just one line:


              1234
            
steps_taken = 8500
status = "Goal Reached" if steps_taken >= 10000 else "Keep Going"

print(status)

When to Use:

The ternary operator is most effective when the condition is straightforward, and you're assigning values based on that condition. If the logic is more complex, it's better to stick with the full if-else statement to maintain clarity.

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You're building a fitness tracker app that reminds users whether they have met their daily water intake goal. The program should check the user's water intake and provide appropriate feedback.

Use the ternary operator to determine the correct message in a single line of code.
If the user has consumed 2 liters or more, store the message: "You've met your hydration goal!".
Use the true_message variable.
If the user has consumed less than 2 liters, store the message: "Drink more water to reach your goal.".
Use the false_message variable.
Store the message in a variable for later use.

Lösning

Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 2. Kapitel 4

Using Conditional Expressions in Python

The syntax for the ternary operator is as follows:

python

This syntax evaluates the condition, and if it's True, it assigns the true_value; otherwise, it assigns the false_value.

Example 1: Standard `if-else` Statement

Let's say we want to assign a fitness status to a user based on the number of steps they've walked.


              123456789
            
steps_taken = 8500
status = ""

if steps_taken >= 10000:
    status = "Goal Reached"
else:
    status = "Keep Going"

print(status)

Example 2: Using Ternary Operator

We can achieve the same result using the ternary operator in just one line:


              1234
            
steps_taken = 8500
status = "Goal Reached" if steps_taken >= 10000 else "Keep Going"

print(status)

When to Use:

Uppgift

Swipe to start coding

You're building a fitness tracker app that reminds users whether they have met their daily water intake goal. The program should check the user's water intake and provide appropriate feedback.

Use the ternary operator to determine the correct message in a single line of code.
If the user has consumed 2 liters or more, store the message: "You've met your hydration goal!".
Use the true_message variable.
If the user has consumed less than 2 liters, store the message: "Drink more water to reach your goal.".
Use the false_message variable.
Store the message in a variable for later use.

Lösning

Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan

Var allt tydligt?

Tack för dina kommentarer!

Avsnitt 2. Kapitel 4

Byt till skrivbordet för praktisk övningFortsätt där du är med ett av alternativen nedan

Conditional Statements in Python

Using Conditional Expressions in Python

Example 1: Standard if-else Statement

Example 2: Using Ternary Operator

When to Use:

Lösning

Using Conditional Expressions in Python

Example 1: Standard if-else Statement

Example 2: Using Ternary Operator

When to Use:

Lösning

Example 1: Standard `if-else` Statement

Example 1: Standard `if-else` Statement