Initial data commit

Task/Exponentiation-operator/Lua/exponentiation-operator.lua

@@ -0,0 +1,26 @@
+number = {}
+
+function number.pow( a, b )
+    local ret = 1
+    if b >= 0 then
+        for i = 1, b do
+            ret = ret * a.val
+        end
+    else
+        for i = b, -1 do
+            ret = ret / a.val
+        end
+    end
+    return ret
+end
+
+function number.New( v )
+    local num = { val = v }
+    local mt = { __pow = number.pow }
+    setmetatable( num, mt )
+    return num
+end
+
+x = number.New( 5 )
+print( x^2 )                   --> 25
+print( number.pow( x, -4 ) )   --> 0.016