# Functions embedded in Julia

**URL:** <https://discourse.julialang.org/t/functions-embedded-in-julia/93368>\
**Category:** Numerics\
**Created:** [January 22, 2023, 5:55pm UTC](https://discourse.julialang.org/t/functions-embedded-in-julia/93368 "2023-01-22T17:55:31Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Andrea\_Del\_Bravo](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/andrea_del_bravo/32/45682_2.png) [@Andrea\_Del\_Bravo](https://discourse.julialang.org/u/Andrea_Del_Bravo)\
**Post date:** [January 22, 2023, 5:55pm UTC](https://discourse.julialang.org/t/functions-embedded-in-julia/93368/1 "2023-01-22T17:55:31Z")

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I installed Julia on a laptop running ferdora 36 operating system. I tried to capture some xeta function values but the answer was that zeta(x) was not recognize a a valid command. I read on the Julia manual that zeta is embedded in language. Does anybody know why this happened to me?  
Thanks a lot in advance  
Andrea

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**Author:** ![lmiq](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lmiq/32/18314_2.png) [@lmiq](https://discourse.julialang.org/u/lmiq)\
**Post date:** [January 22, 2023, 6:02pm UTC](https://discourse.julialang.org/t/functions-embedded-in-julia/93368/2 "2023-01-22T18:02:28Z")

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I think you need

```julia
using SpecialFunctions

```

first.

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**Author:** ![Andrea\_Del\_Bravo](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/andrea_del_bravo/32/45682_2.png) [@Andrea\_Del\_Bravo](https://discourse.julialang.org/u/Andrea_Del_Bravo)\
**Post date:** [January 22, 2023, 6:17pm UTC](https://discourse.julialang.org/t/functions-embedded-in-julia/93368/3 "2023-01-22T18:17:24Z")

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OK thanks. I’m very new to Julia, and I learn just now that I need additional packages.  
Thanks a lot and sorry  
Andrea