Java是否具有指数运算符? [英] Does Java have an exponential operator?

问题描述

Java中是否存在指数运算符?

Is there an exponential operator in Java?

例如，如果提示用户输入两个数字，然后他们输入 3 和 2 ，则正确答案应为 9 .

For example, if a user is prompted to enter two numbers and they enter 3 and 2, the correct answer would be 9.

import java.util.Scanner;
public class Exponentiation {

    public static double powerOf (double p) {
        double pCubed;

        pCubed = p*p;
        return (pCubed);
    }

    public static void main (String [] args) {
        Scanner in = new Scanner (System.in);

        double num = 2.0;
        double cube;    

        System.out.print ("Please put two numbers: ");
        num = in.nextInt();

        cube = powerOf(num);

        System.out.println (cube);
    }
}

推荐答案

使用用户输入来执行此操作:

To do this with user input:

public static void getPow(){
    Scanner sc = new Scanner(System.in);
    System.out.println("Enter first integer: ");    // 3
    int first = sc.nextInt();
    System.out.println("Enter second integer: ");    // 2
    int second = sc.nextInt();
    System.out.println(first + " to the power of " + second + " is " + 
        (int) Math.pow(first, second));    // outputs 9

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