# How to declare type variables using elixir/dialyixir?

**URL:** <https://forum.elixirforum.com/t/how-to-declare-type-variables-using-elixir-dialyixir/13948>\
**Category:** Questions\
**Tags:** dialyzer, algebraic\_data\_type, typespecs, dialyxir\
**Created:** [April 29, 2018, 4:36pm UTC](https://forum.elixirforum.com/t/how-to-declare-type-variables-using-elixir-dialyixir/13948 "2018-04-29T16:36:09Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![NobbZ](https://forum.elixirforum.com/user_avatar/forum.elixirforum.com/nobbz/32/27235_2.png) [@NobbZ](https://forum.elixirforum.com/u/NobbZ)\
**Post date:** [April 29, 2018, 4:55pm UTC](https://forum.elixirforum.com/t/how-to-declare-type-variables-using-elixir-dialyixir/13948/5 "2018-04-29T16:55:47Z")

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Close… `when a: var`, or `t` 😉

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