public class Num1 {
public static void main(String[] args) {
//1.static int abs(int) 求绝对值
double abs=Math.abs(-3.014);
System.out.println("abs:"+abs);
int abs1=Math.abs(-5);
System.out.println("abs1:"+abs1);
//2.double ceil(double) 向上取整
double ceil=Math.ceil(3.000001);
System.out.println("ceil:"+ceil);
double ceil1 =Math.ceil(-6.88);
System.out.println("ceil1"+ceil1);
//3.double floor(double) 向下取整
double floor=Math.floor(9.88);
System.out.println("floor:"+floor);
double floor1=Math.floor(-6.12);
System.out.println("floor1:"+floor1);
//4.double round(double) 四舍五入
double round=Math.round(3.14);
System.out.println("round:"+round);
//5.double sqrt(double) 开方
double sqrt=Math.sqrt(2);
System.out.println("sqrt:"+sqrt);
double sqrt1=Math.sqrt(8);
System.out.println("sqrt:"+sqrt);
}
}
Math常用API
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转载自blog.csdn.net/Llyon/article/details/107598595
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