一个专注于简单的开源跨平台编程语言。这门语言的设计目标是改进阅读与编写效率，降低语法负担。让使用者能够把真正的注意力放在解决问题上，只需极少的代码就能优雅地表达逻辑。[中文手册](https://github.com/kulics/xs/blob/master/book-zh/introduction.md)，示例代码如下： ``` # export namespace \HelloWorld { System # import namespace } # package program -> { # main function Main() -> () { # list greetings := {"Hello", "Hola", "Bonjour", "Ciao", "こんにちは", "안녕하세요", "Cześć", "Olá", "Здравствуйте", "Chào bạn", "您好"} # for-each @ item <- greetings { # switch ? item -> [ 0 <= 8 ] { prt(item) # call function } _ { # lambda prt( greetings.filter( {it -> it.len> 4} ) ) <- @ } } } } ```