local a = 0

function in_file()
    a += 1

    a == 1
end

function in_file_again()
    a += 1

    a == 2
end

function in_function()
    local a = 10

    a += 20

    a == 30
end

function in_scope()
    local a = 10

    if true
        local a = 20
        a += 10
        a == 30
        return
    end

    false
end