# 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:** 5

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### Author: ![yuyichao](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yuyichao/32/20_2.png) [@yuyichao](https://discourse.julialang.org/u/yuyichao)
#### Post date: [May 22, 2017, 3:41am UTC](https://discourse.julialang.org/t/question-mark-in-variable-names/3836/5 "2017-05-22T03:41:13Z")

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Prime is allowed

```julia
julia> a′ = 1
1

julia> a′ + 2
3

```

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