ipairs Function

function square(iteratorMaxCount,currentNumber)

   if currentNumber<iteratorMaxCount
   then
      currentNumber = currentNumber+1
      return currentNumber, currentNumber*currentNumber
   end
	
end

function squares(iteratorMaxCount)
   return square,iteratorMaxCount,0
end  

for i,n in squares(3)
do 
   print(i,n)
end