java-math

package day7;
import static java.lang.Math.*;
public class MathClass {
    public static void main(String[] args) {
        //取绝对值
        double A = abs(-3.14);
        System.out.println(A);
        //向上取整
        double B = ceil(3.14);
        System.out.println(B);
        //向下取整
        double C = floor(3.14);
        System.out.println(C);
        //四舍五入
        long D = round(3.14);
        System.out.println(D);
        long E = round(PI);
        System.out.println(E);
    }
}