Truthy and falsy values in Python - Mini Project: Build & Apply

Truthy and falsy values in Python

📖 Scenario: You are building a simple program that checks if different values are considered true or false in Python. This helps in understanding how Python decides whether something is 'truthy' or 'falsy' when used in conditions.

🎯 Goal: Create a list of different values, set a threshold for truthiness, check each value's truthiness using a loop, and print the results.

📋 What You'll Learn

Create a list called values with specific values

Create a variable called threshold with the value True

Use a for loop with variable val to check each value's truthiness

Print the value and whether it is truthy or falsy exactly as shown

💡 Why This Matters

🌍 Real World

Understanding truthy and falsy values helps when writing conditions in programs, such as checking if a user input is empty or if a list has items.

💼 Career

Many programming jobs require writing clear and correct conditional statements. Knowing truthy and falsy values prevents bugs and makes code easier to read.

1

Create the list of values

Create a list called values with these exact items: 0, 1, "" (empty string), "Hello", [] (empty list), and [1, 2] (list with two numbers).

Python

# Create the list called values with the exact items
# Your code here

Need a hint?

Remember to include all items exactly in the list, including empty string and empty list.

2

Set the threshold variable

Create a variable called threshold and set it to True.

Python

values = [0, 1, "", "Hello", [], [1, 2]]
# Create the variable threshold and set it to True
# Your code here

Need a hint?

Just assign the value True to the variable threshold.

3

Check truthiness of each value

Use a for loop with variable val to go through each item in values. Inside the loop, create an if statement that checks if val is truthy. If it is, print val and the text "is truthy". Otherwise, print val and "is falsy".

Python

values = [0, 1, "", "Hello", [], [1, 2]]
threshold = True
# Use a for loop with val to check each value's truthiness
# Your code here

Need a hint?

Use if val: to check truthiness. Remember to print exactly as shown.

4

Print the results

Run the program to print each value from values followed by whether it "is truthy" or "is falsy" exactly as in the example.

Python

values = [0, 1, "", "Hello", [], [1, 2]]
threshold = True
for val in values:
    if val:
        print(val, "is truthy")
    else:
        print(val, "is falsy")
# Run the program to see the output

Need a hint?

Make sure your print statements match the expected output exactly, including spaces.