Initial data commit

Task/Anonymous-recursion/Go/anonymous-recursion-2.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+)
+
+func fib(n int) (result int, err error) {
+	var fib func(int) int // Must be declared first so it can be called in the closure
+	fib = func(n int) int {
+		if n < 2 {
+			return n
+		}
+		return fib(n-1) + fib(n-2)
+	}
+
+	if n < 0 {
+		err = errors.New("negative n is forbidden")
+		return
+	}
+
+	result = fib(n)
+	return
+}
+
+func main() {
+	for i := -1; i <= 10; i++ {
+		if result, err := fib(i); err != nil {
+			fmt.Printf("fib(%d) returned error: %s\n", i, err)
+		} else {
+			fmt.Printf("fib(%d) = %d\n", i, result)
+		}
+	}
+}