Multiple results 를 return 하는 함수 구현

 function getMin(a)  
      local min_i = -1  
      local min_v = math.huge  
      for i, v in pairs(a) do  
           if min_v > v then  
                min_v = v  
                min_i = i  
           end  
      end  
      return min_i, min_v  
 end  
   
 local heights = {167, 195, 180, 153, 155}  
 local minHeight_i, minHeight = getMin(heights)  
 print("a[" .. minHeight_i .. "] = " .. minHeight)  

키워드 : function