> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/s/string_case.md).

# String case

```ruby
say "alphaBETA".lc             #=> alphabeta
say "alphaBETA".uc             #=> ALPHABETA
say "alphaBETA".tc             #=> AlphaBETA
say "alpha BETA".wc            #=> Alpha Beta
say "alpha BETA".tc            #=> Alpha BETA
say "alpha BETA".tclc          #=> Alpha beta
```