# Xcode Letter Definitions

**URL:** <https://forums.kodeco.com/t/xcode-letter-definitions/119912>\
**Category:** iOS Apprentice\
**Created:** [September 13, 2020, 10:23am UTC](https://forums.kodeco.com/t/xcode-letter-definitions/119912 "2020-09-13T10:23:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![geezer](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/geezer/32/81494_2.png) [@geezer](https://forums.kodeco.com/u/geezer)\
**Post date:** [September 13, 2020, 10:23am UTC](https://forums.kodeco.com/t/xcode-letter-definitions/119912/1 "2020-09-13T10:23:30Z")

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What are the letters to the far left of the attached image in Xcode called and where do I find their meanings? I can take a guess what some mean from what we have learned so far but would like to be certain. ![Screen Shot 2020-09-13 at 5.50.29 AM](https://files.chunter.kodeco.com/original/3X/0/a/0aa41915473ad00d4d06be8b00b6aa883933a8bd.png)

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**Author:** ![gdelarosa](https://assets.chunter.kodeco.com/user_avatar/forums.kodeco.com/gdelarosa/32/109063_2.png) [@gdelarosa](https://forums.kodeco.com/u/gdelarosa)\
**Post date:** [September 14, 2020, 3:44pm UTC](https://forums.kodeco.com/t/xcode-letter-definitions/119912/2 "2020-09-14T15:44:55Z")

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Hi @geezer, that’s a great question! I was unable to find a direct source to the Apple documentation but found [a link](https://stackoverflow.com/questions/6662395/xcode-intellisense-meaning-of-letters-in-colored-boxes-like-f-t-c-m-p-c-k-etc%29) that describes them as “Code Sense”.

A shortened version:

- C: class
- S: struct
- Pr: Protocol
- Ex: extension (found in the symbol navigator, but not code completion)
- T: Type (generic type constraint, protocol associated type, etc)

Link to the longer version: [objective c - Xcode intellisense meaning of letters in colored boxes like f,T,C,M,P,C,K,# etc - Stack Overflow](https://stackoverflow.com/questions/6662395/xcode-intellisense-meaning-of-letters-in-colored-boxes-like-f-t-c-m-p-c-k-etc%29)

Best,  
Gina

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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:** [February 27, 2021, 2:23am UTC](https://forums.kodeco.com/t/xcode-letter-definitions/119912/3 "2021-02-27T02:23:33Z")

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