Lesson 5: Boolean Logic and if Statements

Topics Covered:

• Understanding True and False
• Using comparison operators
• Writing simple if statements to control program flow

What is Boolean Logic?

Boolean values are either True or False. They are used to make decisions in a program.

Comparison Operators

• == equal to
• != not equal to
• > greater than
• < less than
• >= greater than or equal to
• <= less than or equal to

print(5 == 5)     # True
print(3 > 10)     # False
print(7 != 2)     # True

Using if Statements

An if statement lets you run code only if something is true.

age = int(input("How old are you? "))

if age >= 13:
    print("You're a teenager!")

Example: Favorite Animal Checker

animal = input("What is your favorite animal? ")

if animal == "dog":
    print("Dogs are awesome!")

Challenge Task

• Ask the user for their test score (0–100).
• If the score is 50 or higher, say “You passed!”.
• Otherwise, say “Try again next time.”

score = int(input("Enter your score: "))

if score >= 50:
    print("You passed!")
else:
    print("Try again next time.")