# A question about module

**URL:** <https://discourse.julialang.org/t/a-question-about-module/42415>\
**Category:** Optimization (Mathematical)\
**Tags:** question\
**Created:** [July 2, 2020, 7:45am UTC](https://discourse.julialang.org/t/a-question-about-module/42415 "2020-07-02T07:45:56Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![abcde](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/abcde/32/16180_2.png) [@abcde](https://discourse.julialang.org/u/abcde)\
**Post date:** [July 2, 2020, 7:45am UTC](https://discourse.julialang.org/t/a-question-about-module/42415/1 "2020-07-02T07:45:56Z")

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want to use another script’s module in one script,it always tell me “a” is not defind,

```julia
module asd
export a
a=2
end

```

```julia
include("Julia测试.jl")
print(a)

```

thanks!!

---

<div class="post-metadata">

**Author:** ![oheil](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/oheil/32/220745_2.png) [@oheil](https://discourse.julialang.org/u/oheil)\
**Post date:** [July 2, 2020, 7:56am UTC](https://discourse.julialang.org/t/a-question-about-module/42415/2 "2020-07-02T07:56:24Z")

</div>

With “include” the module is just defined, but bot not yet “used”:

```julia
julia> include("Julia测试.jl")
Main.asd

julia> using Main.asd

julia> a
2

```

[https://docs.julialang.org/en/v1/manual/modules/](https://docs.julialang.org/en/v1/manual/modules/)