Introduction to Java Programming Comprehensive Version 10th

Introduction to Java Programming, Comprehensive Version (10th Edition)

Methods And Arrays

Compute the powers of 2 and store them in the integer array power with 10 elements. That is store 1,2,4,8,16,32... etc. Use a for loop and the Math.pow to raise the 2 to the power of the index. Be sure to cast the Math.pow results to an int. Also, print out each of the elements in the array.

Solution

Code to copy:

public class PowerTest2 {

    public static void main(String[] args) {

        int result = Math.pow(20, 5);

        System.out.println(\"The power of these numbers is: \" + result);

        {

            for (int k = 1; k <= 10; k++) {

                for (int j = 1; j <= 3; j++) {

                    int loopResult = Math.pow(k, j);

                    System.out.println(k + \" to the power of \" + j + \" is: \"

                            + loopResult);

                }

            }

        }

{

        int[][] array3d = new int [10] [3];

{

for (int k = 0; k < array2d.length; k++) {

    for (int j = 0; j < array2d[0].length; j++) {

        {

            int loopResult = Math.pow(k, j);

            array2d[k][j] = loopResult;

            System.out.println(\"The variable at \" + ik+ \" \" + j

                + \" is: \" + array2d[k][j]);

        }

    }

}

    }

    public static int Math.pow(int a, int b) {

        int s = a;

        int result = a;

        for (int i = 1; i < b; i++) {

            s = s * a;

            result = s;

        }

        return result;

    }

}