Source code in the lua programming language

BI = { -- Bounded Integer
  new = function(self, v) return setmetatable({v = self:_limit(v)}, BI_mt) end,
  _limit = function(self,v) return math.max(1, math.min(math.floor(v), 10)) end,
}
BI_mt = {
  __index = BI,
  __call = function(self,v) return self:new(v) end,
  __unm = function(self) return BI(-self.v) end,
  __add = function(self,other) return BI(self.v+other.v) end,
  __sub = function(self,other) return BI(self.v-other.v) end,
  __mul = function(self,other) return BI(self.v*other.v) end,
  __div = function(self,other) return BI(self.v/other.v) end,
  __mod = function(self,other) return BI(self.v%other.v) end,
  __pow = function(self,other) return BI(self.v^other.v) end,
  __eq = function(self,other) return self.v==other.v end,
  __lt = function(self,other) return self.v<other.v end,
  __le = function(self,other) return self.v<=other.v end,
  __tostring = function(self) return tostring(self.v) end
}
setmetatable(BI, BI_mt)


zero, one, two, three, four, five = BI(0), BI(1), BI(2), BI(3), BI(4), BI(5)
six, seven, eight, nine, ten, eleven = BI(6), BI(7), BI(8), BI(9), BI(10), BI(11)
print("zero through eleven:\t", zero, one, two, three, four, five, six, seven, eight, nine, ten, eleven)
print("zero less than one?\t", zero < one)
print("eleven greater than ten?", eleven > ten)
print("negative one equals one:", -one)
print("zero plus one equals two:", zero + one)
print("one minus one equals one:", one - one)
print("two minus three equals one:", two - three)
print("three minus two equals one:", three - two)
print("two times three equals six:", two * three)
print("two times three equals six?", two * three == six)
print("three times four equals ten?", three * four == ten)
print("one divided by two equals one:",one / two)
print("five divided by two equals two:", five / two)
print("order of operations (seven):", one + two * three)
print("order of operations (nine):", (one + two) * three)
print("eight mod three equals two:", eight % three) 
print("eight mod two equals one:", eight % two)
print("two to the third equals eight:", two ^ three)
print("two to the fourth equals ten:", two ^ four)