Julia 1.0 UndefVarError - Scope of Variable

Question

I am moving from Julia 0.7 to 1.0. It seems that Julia\'s rule for the scope of variables changed from 0.7 to 1.0. For example, I want to run a simple loop like this:

Answer 1

Just remember that inside a function you won't use global, since the scope rules inside a function are as you would expect:

function testscope()
    num = 0
    for i = 1:5
        if i == 3
            num = num + 1
        end
    end
    return num
end


julia> t = testscope()
1

The unexpected behaviour is only in REPL. More on this here