# Subtype of every other type

**URL:** https://discourse.julialang.org/t/subtype-of-every-other-type/12117
**Category:** General Usage
**Created:** [July 3, 2018, 3:35am UTC](https://discourse.julialang.org/t/subtype-of-every-other-type/12117 "2018-07-03T03:35:36Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Qiyamah](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/qiyamah/32/2660_2.png) [@Qiyamah](https://discourse.julialang.org/u/Qiyamah)
#### Post date: [July 3, 2018, 3:35am UTC](https://discourse.julialang.org/t/subtype-of-every-other-type/12117/1 "2018-07-03T03:35:36Z")

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Is there type which is subtype of every other type in julia?

Void \<: Int

return false.

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### Author: ![quinnj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/quinnj/32/11_2.png) [@quinnj](https://discourse.julialang.org/u/quinnj)
#### Post date: [July 3, 2018, 3:42am UTC](https://discourse.julialang.org/t/subtype-of-every-other-type/12117/2 "2018-07-03T03:42:57Z")

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`Union{}` the empty set/union