Adding fibonacci function

Author: gustavo-marini

math/fibonacci.lua

@@ -0,0 +1,17 @@
+function fibonacci(number)
+
+	if(number < 2) then
+		return number
+	else
+		return fibonacci(number-1) + fibonacci(number-2)
+	end
+
+end
+
+
+print("fibonacci(5) = ", fibonacci(5))
+print("fibonacci(8) = ", fibonacci(8))
+print("fibonacci(13) = ", fibonacci(13))
+print("fibonacci(15) = ", fibonacci(15))
+print("fibonacci(18) = ", fibonacci(18))
+print("fibonacci(25) = ", fibonacci(25))