does this help any?
julia> a = 1
1
julia> function inc()
a = a+1
end
inc (generic function with 1 method)
julia> inc()
ERROR: UndefVarError: a not defined
in inc at none:2
julia> function inc()
global a = a+1
end
inc (generic function with 1 method)
julia> inc()
2
julia> inc()
3
julia> inc()
4
julia> inc()
5
julia> function make_inc(start)
a = start
function inc()
a = a + 1
end
end
make_inc (generic function with 1 method)
julia> inc2 = make_inc(99)
inc (generic function with 1 method)
julia> inc2()
100
julia> inc2()
101
julia> inc2()
102
also http://julia.readthedocs.org/en/latest/manual/variables-and-scoping/
andrew
On Monday, 8 June 2015 11:34:47 UTC-3, [email protected] wrote:
>
> I'm currently trying to understand how functions with an exclamation mark
> at the end work. I know the exclamation mark is just a notational point
> however I'm currently confused at how to actually write a mutable function.
> If a = 1
>
> function add_one(a)
> return a + 1
> end
>
> running add_one(a) twice outputs:
> 2
> 2
>
> how would I create add_one!(a) to output:
> 2
> 3
>
