# Chapter 16 example: a grade letter chain.

score = 73

if score >= 90:
    print("Grade: A")
elif score >= 80:
    print("Grade: B")
elif score >= 70:
    print("Grade: C")
elif score >= 60:
    print("Grade: D")
else:
    print("Grade: F")

# Try changing score to 90, 89, 70, 69, 0 and run each time.