function main()
    local grade::String = "B"
    if grade == "A"
        println("Excellent!")
    elseif grade == "B"
    elseif grade == "C"
        println("Well done")
    elseif grade == "D"
        println("You passed")
    elseif grade == "F"
        println("Better try again")
    else
        println("Invalid grade")
    end
    println("Your grade is ", " ", grade)
end

main()
