Summary of some methods of rounding (Java)

The math class provides three methods for rounding:ceil, Floor, andround, which correspond to the meanings of their English names, for example, theEnglish meaning of Ceil is the ceiling, which means rounding up, so, The result of Math.ceil (11.3) is that the result of 12,math.ceil (-11.3) is -11;floor, the English meaning is the flooring, the method is to be rounded down, so,Math.floor (11.6) The result of 11,math.floor (-11.6) is the result of -12; The most difficult to master is the round method, which means "rounding ", the algorithm is Math.floor (x+0.5), The original number is added to 0.5 and then rounded down, so theresult of Math.Round (11.5) is Math.Round, andThe result of the (-11.5) is -11.

Summary of some methods of rounding (Java)