# Question mark in variable names

**URL:** <https://discourse.julialang.org/t/question-mark-in-variable-names/3836>\
**Category:** Internals & Design\
**Tags:** question\
**Created:** [May 21, 2017, 4:27pm UTC](https://discourse.julialang.org/t/question-mark-in-variable-names/3836 "2017-05-21T16:27:56Z")\
**Posts on this page:** 1\
**Showing post:** 33

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**Author:** ![ararslan](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ararslan/32/3825_2.png) [@ararslan](https://discourse.julialang.org/u/ararslan)\
**Post date:** [July 4, 2017, 6:06pm UTC](https://discourse.julialang.org/t/question-mark-in-variable-names/3836/33 "2017-07-04T18:06:40Z")

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As a heads up, it’s quite unlikely that `?` will be allowed as part of variable names, since postfix `?` is being claimed in Julia 1.0 as `T? == Union{T, Null}` (see [this data ecosystem announcement](https://discourse.julialang.org/t/announcement-an-update-on-dataframes-future-plans/4646)). In anticipation of this, omitting whitespace between an expression and the `?` in a ternary [has been deprecated](https://github.com/JuliaLang/julia/pull/22523) in 0.7.

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