Usage of Math

public class Mathdemo {

public static void Main (string[] args)

{

/**

* Ceil ceiling means to return a large value, note some special values

*/

Double D=math.ceil (16.34); 17.0

Double D=math.ceil (-16.34); -16.0

Double D=math.ceil (1.34); 2.0

/**

* Floor meaning is to return a small value

*/

Double D1=math.floor (12.34); 12.0

Double D1=math.floor (16.34); 16.0

Double D1=math.floor (-16.34); -17.0

/**

* Round rounding, float returns int value, double returns Long value

*/

Long A=math.round (12.34); 12

Long A=math.round (12.54); 13

/**

* MATH.POW (x, y): x y-square

*/

Double D2=math.pow (2, 3); 8

/**

* Math.random Returns a random number between 0 and 1

*/

Double X=math.random (); Returns a random number between 0.0,1.0, greater than or equal to 0.0, less than 1.0

Double x= (int) (Math.random () *10); Returns the number of a random integer between 0.0,10.0

int x= (int) (Math.random () *10+1); Returns a random number between 1,10, which may be 1 or 10

SOP ("d=" +d);

SOP ("d1=" +d1);

SOP ("a=" +a);

SOP ("d2=" +d2);

SOP ("x=" +x);

}

public static void Sop (Object obj)

{

System.out.println (obj);

}

}

Usage of Math