Elif Chains

Sometimes a program needs more than two choices.

For example:

• If score is 80 or more, grade is A
• If score is 60 or more, grade is B
• Otherwise, grade is C

Python uses elif when you want to check more than one condition.

What Is Elif?

elif means else if.

It lets Python check another condition if the first if condition is false.

score = 75

if score >= 80:
    print("Grade A")
elif score >= 60:
    print("Grade B")
else:
    print("Grade C")

How It Works

Python checks from top to bottom:

• First, it checks score >= 80
• If false, it checks score >= 60
• If true, it prints Grade B
• If all conditions are false, else runs

Why Order Matters

Python stops when it finds the first true condition.

So always place higher conditions first.

score = 90

if score >= 80:
    print("A")
elif score >= 60:
    print("B")
else:
    print("C")

Another Example

age = 15

if age >= 18:
    print("Adult")
elif age >= 13:
    print("Teenager")
else:
    print("Child")

Code Along

marks = 45

if marks >= 70:
    print("Excellent")
elif marks >= 50:
    print("Pass")
else:
    print("Fail")

Mini Challenge

Build a grading system.

Steps:

• Ask the user to enter a score
• If the score is 80 or more, print:
  Grade A
• If the score is 60 or more, print:
  Grade B
• Otherwise, print:
  Grade C

Real World Use Case

Schools, websites, and apps use elif to show different results based on scores, ages, plans, or user choices.

Quiz

1. What does elif mean?
2. When does Python check an elif block?
3. Why does order matter in elif chains?
4. What happens if all conditions are false?

Assignment

Create a program that asks the user for age:

• If age is 18 or more, print Adult
• If age is 13 or more, print Teenager
• Otherwise, print Child

Summary

You learned how to use elif to handle multiple choices and make smarter Python programs.