Crumb 是一门函数式编程语言，没有 “关键字”，一切皆函数 (0 keywords, everything is a function)。

其他特性包括提供垃圾回收 (GC)、动态类型、具有简洁的语法和详细的标准库。

示例代码

table = (map (range 10) {_ y ->
  <- (map (range 10) {item x ->
    <- (multiply (add x 1) (add y 1))
  })
})

(loop 100 {i -> 
  i = (add i 1)
  
  (if (is (remainder i 15) 0) {
    (print "fizzbuzz\n")
  } {
    (if (is (remainder i 3) 0) {
      (print "fizz\n")
    } {
      (if (is (remainder i 5) 0) {
        (print "buzz\n")
      } {
        (print i "\n")
      })
    })
  })
})

• 实现斐波那契数列

// use a simple recursive function to calculate the nth fibonacci number
fibonacci = {n ->
  <- (if (is n 0) {<- 0} {
    <- (if (is n 1) {<- 1} {
      <- (add 
        (fibonacci (subtract n 1)) 
        (fibonacci (subtract n 2))
      )
    })
  })
}

(until "stop" {state n ->
  (print (add n 1) "-" (fibonacci (add n 1)) "\n")
})

更多示例代码：https://github.com/liam-ilan/crumb/tree/main/examples

标准库包括：IO、Comparisons、Logical Operators、Arithmetic 等。