package com.swift;

public class MathDemo {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        //數學類的小總結 Math
        System.out.println(Math.pow(4, 3));//冪運算 64
        System.out.println(Math.pow(4, 0.5));//4的開方
        System.out.println(Math.pow(2, -2));//0.25 2的2次冪分之1
 

        System.out.println(Math.sqrt(16));//0.25 2的2次冪分之1  square root sqrt
        System.out.println(Math.sqrt(25));//0.25 2的2次冪分之1
        System.out.println(Math.abs(-3));//0.25 2的2次冪分之1 absolute
        System.out.println(Math.ceil(2.6));//0.25 2的2次冪分之1 absolute
        System.out.println(Math.ceil(2.1));//
 
0.25 2的2次冪分之1 absolute
        System.out.println(Math.floor(2.1));//0.25 2的2次冪分之1 absolute
        System.out.println(Math.rint(2.1));//0.25 2的2次冪分之1 absolute 返回偶數
        System.out.println(Math.round(2.1));//正數四舍五入，負數五舍六入
    }

}

Math類小結