# [erlang-questions] strange result of lists:map(fun(X)-> 20*X end, [2, 4, 6, 8]).

Work elbrujohalcon@REDACTED
Tue Dec 3 16:24:41 CET 2013

```Hi!

Since strings in Erlang are just lists of integers, and the results of some of your tests are proper lists of strings, they’re *displayed* as strings.
In other words "(Px?" = [40, 80, 120, 160]
Hope that helps :)
For reference, check this: http://learnyousomeerlang.com/starting-out-for-real#lists

On Dec 3, 2013, at 12:13, <hope@REDACTED> <hope@REDACTED> wrote:

> Hi,
>
> I am a beginner,  and I got some strange result like this :
>
> 1> L=[2,4,6,8].
> [2,4,6,8]
> 2> lists:map(fun(X)-> 20*X end,L).
> "(Px?"
> 3> lists:map(fun(X)-> 21*X end,L).
> "*T~‥"
> 4> lists:map(fun(X)-> 27*X end,L).
> "6l¢O"
> 5> lists:map(fun(X)-> 28*X end,L).
> "8p‥a"
> 6> lists:map(fun(X)-> 29*X end,L).
> ":tRe"
> 7> lists:map(fun(X)-> 30*X end,L).
> "<x’e"
> 8> lists:map(fun(X)-> 31*X end,L).
> ">|oo"
> 9> lists:map(fun(X)-> 32*X end,L).
> [64,128,192,256]
> 10> lists:map(fun(X)-> 22*X end,L).
> [44,88,132,176]
> 11> lists:map(fun(X)-> 23*X end,L).
> [46,92,138,184]
> 12> lists:map(fun(X)-> 24*X end,L).
> [48,96,144,192]
> 13> lists:map(fun(X)-> 25*X end,L).
> [50,100,150,200]
> 14> lists:map(fun(X)-> 26*X end,L).
> [52,104,156,208]
> 15> lists:map(fun(X)-> 27*X end,L).
> "6l¢O"
>
> -------------------
> Erlang R16B02 (erts-5.10.3) [smp:2:2] [async-threads:10]
> Eshell V5.10.3 (abort with ^G)
> -------------------
> Windows Vista
> -------------------
>
> Can someone help me ?
>
> Thanks a lot !
>
> best regards.
>
>
> hope@REDACTED  2013.12.03
>
>
> _______________________________________________
> erlang-questions mailing list
> erlang-questions@REDACTED
> http://erlang.org/mailman/listinfo/erlang-questions

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://erlang.org/pipermail/erlang-questions/attachments/20131203/cd62cea3/attachment.htm>
```