function main()
    local a::Int32
    local b::Int32
    local i::Int32
    local j::Int32
    j = 0
    a = 1
    b = 10
    for i ∈ a:b
        j = j + i
    end
    if j ≠ 55
        println(Base.stderr, "ERROR STOP")
        exit(1)
    end
    println(j)
    a = 0
    for i ∈ 1:10
        for j ∈ 1:10
            a = a + (i - 1) * 10 + j
        end
    end
    if a ≠ 100 * 101 ÷ 2
        println(Base.stderr, "ERROR STOP")
        exit(1)
    end
    println(a)
    a = 0
    for i ∈ 1:10
        for j ∈ 1:i
            a = a + j
        end
    end
    if a ≠ 220
        println(Base.stderr, "ERROR STOP")
        exit(1)
    end
    println(a)
end

main()
