-- Chapter 16 example: a grade letter chain.

local score = 73

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

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