# When to use Observable and Subject?

**URL:** <https://forums.kodeco.com/t/when-to-use-observable-and-subject/71979>\
**Category:** RxSwift\
**Created:** [May 25, 2019, 9:12pm UTC](https://forums.kodeco.com/t/when-to-use-observable-and-subject/71979 "2019-05-25T21:12:37Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![mike](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/mike/32/102075_2.png) [@mike](https://forums.kodeco.com/u/mike)\
**Post date:** [May 25, 2019, 9:12pm UTC](https://forums.kodeco.com/t/when-to-use-observable-and-subject/71979/1 "2019-05-25T21:12:37Z")

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I am working on Chapter 4 now and may be too early to ask this question. Both Observable and Subject could emit events and call **.subscribe()** as an observer. So, when to use Observable and when to use Subject?

Thanks,  
Mike

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**Author:** ![shogunkaramazov](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/shogunkaramazov/32/108826_2.png) [@shogunkaramazov](https://forums.kodeco.com/u/shogunkaramazov)\
**Post date:** [July 9, 2019, 3:17am UTC](https://forums.kodeco.com/t/when-to-use-observable-and-subject/71979/2 "2019-07-09T03:17:06Z")

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@mike Please check out this article when you get a chance:

> **[RxSwift foundation part 2: Observables and Subjects](https://navdeepsinghh.medium.com/rxswift-foundation-part-2-observables-and-subjects-b143f983e757)**
>
> Reactive programming has been in the picture for more than 20 years now, but it did not really start to gain momentum until the…

I hope it helps!

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**Author:** ![mike](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/mike/32/102075_2.png) [@mike](https://forums.kodeco.com/u/mike)\
**Post date:** [July 9, 2019, 10:04am UTC](https://forums.kodeco.com/t/when-to-use-observable-and-subject/71979/3 "2019-07-09T10:04:34Z")

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Thanks, man! Can’t wait to check out the article.

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**Author:** ![system](https://s3.amazonaws.com/cdn.raywenderlich.com/community/forum-assets/noun-game-ghost-878668.png) [@system](https://forums.kodeco.com/u/system)\
**Post date:** [November 8, 2019, 1:17pm UTC](https://forums.kodeco.com/t/when-to-use-observable-and-subject/71979/4 "2019-11-08T13:17:28Z")

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