Hi all,
Near the top of the variables and scoping chapter of the documentation,
there's a list which is kicked off by, "These constructs which introduce
new variables into the current scope are as follows:"). How could this be
worded to express things the other way round --- that is, "When assigning
to a variable, you *usually* create a new local; the only times you don't
are when: ..."?
My understanding thus far is: when assigning to a variable, the only times
you *don't* create a new local is when you're assigning to an already
existing outer local or outer global. Is that the case?
Finally then, if that's the case, what is going on here:
~~~julia
#!/usr/bin/julia
n = 1 # top-level variable, aka global
while n <= 3
println(n)
# Wait. We're assigning here within the `while` scope... Though it would
# be weird, shouldn't that make a new local `n` since we don't have
`global n`
# written anywhere in this scope?
n = n + 1
end
# prints 1 2 3
println("done, and now n = ", n) # prints 4
~~~
Thanks,
-- John
