What is an If Statement?

An if statement lets your program make decisions. It runs different code based on conditions.

Real-World Analogy:

Basic If Statement

age = 18

if age >= 18:
    print("You can vote!")
    print("Welcome to voting!")

Output:

You can vote!
Welcome to voting!

Comparison Operators

These are used in if statements to compare values:

if name == "Alice":
    print("Hi Alice!")

if name != "Bob":
    print("You're not Bob!")

if score > 50:
    print("You passed!")

if age < 13:
    print("You're a kid!")

if score >= 90:
    print("Grade: A")

if age <= 12:
    print("Child price")

If/Else Statement

age = 15

if age >= 18:
    print("You can vote!")
else:
    print("You can't vote yet.")

Output:

You can't vote yet.

If/Elif/Else (Multiple Conditions)

score = 85

if score >= 90:
    print("Grade: A")
elif score >= 80:
    print("Grade: B")
elif score >= 70:
    print("Grade: C")
else:
    print("Grade: F")

Output:

Grade: B

Combining Conditions with AND/OR

age = 25
has_license = True

# AND: Both must be true
if age >= 18 and has_license:
    print("You can drive!")

# OR: At least one must be true
if age < 13 or age > 65:
    print("Special pricing available")

✅ Quick Quiz

🎯 Challenge

Write a program that:

1. Asks the user for their age
2. Uses if/elif/else to print:
   - "Too young" if under 13
   - "Teenager" if 13-19
   - "Adult" if 20 or older

Hint: Use input() to get the user's age