function test_reason() for i = 1:10 if i == 1 x = 1 else x = x+1 end end end test_reason() It seems that it has some scope problem but it’s strange that I have alread define a fucntion for it.

See the loop scoping rules , in particular this part: [N]ew variables introduced in their body scopes are freshly allocated for each loop iteration You need to define x outside the loop if you want it to persist beyond each loop iteration. julia> function test_reason() local x …

Or function test_reason() x = 1 for i = 1:10 if i > 1 x = x+1 end end return x end

Even simpler: function test_reason() x = 0 for i = 1:10 x = x+1 end return x end Or (though I expect this is just due to an overly M MWE): test_reason() = 10

Is there anybody know why this kind of simple code cannot be run?

General Usage

Henrique_Becker December 9, 2021, 12:41am 5

I think I gave a similar question a good answer in the past: I thought I understood "pass-by-sharing" in Julia until I found this - #19 by Henrique_Becker.

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Is there anybody know why this kind of simple code cannot be run?

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