# Why does not G\\\_N\[TAB\] render Unicode for Newton's constant?

**URL:** <https://discourse.julialang.org/t/why-does-not-g-n-tab-render-unicode-for-newtons-constant/124130>\
**Category:** New to Julia\
**Created:** [December 23, 2024, 6:02pm UTC](https://discourse.julialang.org/t/why-does-not-g-n-tab-render-unicode-for-newtons-constant/124130 "2024-12-23T18:02:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mocalvao](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mocalvao/32/19318_2.png) [@mocalvao](https://discourse.julialang.org/u/mocalvao)\
**Post date:** [December 23, 2024, 6:02pm UTC](https://discourse.julialang.org/t/why-does-not-g-n-tab-render-unicode-for-newtons-constant/124130/1 "2024-12-23T18:02:34Z")

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Hi  
I know how to type several Unicode characters for my user-defined variable names (i.e. x\_1[TAB] for subscripted x indexed by 1), but I would like to know why it is not possible to type, in the REPL, G\_N[tab] for Newton’s gravitational constant? Why are some subindices allowed and others not? In particular, I tried the UnicodeREPL.jl package with no success…

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**Author:** ![eldee](https://avatars.discourse-cdn.com/v4/letter/e/b5a626/32.png) [@eldee](https://discourse.julialang.org/u/eldee)\
**Post date:** [December 23, 2024, 6:16pm UTC](https://discourse.julialang.org/t/why-does-not-g-n-tab-render-unicode-for-newtons-constant/124130/2 "2024-12-23T18:16:38Z")

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As far as I know, the reason is simple: a Unicode subscript N just does not exist. [This Wikipedia page](https://en.wikipedia.org/wiki/Unicode_subscripts_and_superscripts) contains an overview of the existing super- and subscript characters in Unicode. Note that also e.g. b and y are missing as subscripts (though are included as superscripts).