Java学习----Math函数

public class TestMath { public static void main(String[] args) {
System.out.println(Math.E);
System.out.println(Math.PI);
System.out.println(Math.abs(-3.5));
System.out.println(Math.ceil(3.5)); // >=
System.out.println(Math.floor(3.5)); // <=
System.out.println(Math.pow(2, 3));
System.out.println(Math.random());// 0-1之间随机数
System.out.println(Math.round(3.5)); // 四舍五入
}
}

2.718281828459045
3.141592653589793
3.5
4.0
3.0
8.0
0.2921187058255972
4