팩토리얼

tutorial/_0001_HelloWorld.lua

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+print("Hello World")

tutorial/_0002_Factorial.lua

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+function factorial(n)
+    if n == 0 then
+        return 1
+    else
+        return n * factorial(n - 1)
+    end
+end
+
+print("Enter a number:")
+a = io.read("*number")
+print(factorial(a))