Lua千分位格式化数字
张成
2015/1
function number_format(num,deperator)
local str1 =""
local str = tostring(num)
local strLen = string.len(str)
if deperator == nil then
deperator = ","
end
deperator = tostring(deperator)
for i=1,strLen do
str1 = string.char(string.byte(str,strLen+1 - i)) .. str1
if math.mod(i,3) == 0 then
--下一个数 还有
if strLen - i ~= 0 then
str1 = ","..str1
end
end
end
return str1
end