Keel - Playground

// A simple recursive function function fib(n) { if n <= 1 { return n; } else { return fib(n-1) + fib(n-2); } } function main() { print(fib(25)); let nums = [1,2,3,4,5,6]; print(nums); for n in nums { print (n ^ 2); } print(nums[1..4]); let hello = "Hello, World!"; print(hello.uppercase()); print(hello.contains("world")); print(hello.contains("World")); }