On Jun 17, 3:51 pm, Back9 <backgoo... at gmail.com> wrote: > Hi, > > I have one byte data and want to know each bit info, > I mean how I can know each bit is set or not? You want the bitwise-and operator, &. For example, to check the least significant bit, bitwise-and with 1: >>> 3 & 1 1 >>> 2 & 1 0