Java: fill in the commented sections of code:

/** * Created by atb on 10/25/16. */

import java.text.DecimalFormat; import java.util.*;

public class Chapter8_FillInTheCode { public static void main(String[] args) { // ------> exercise 27 // this code assigns the value 10 to all elements of an array a27 int[] a27 = new int[25]; for (int i = 0; i < a27.length; i++) { // your code goes here

} System.out.println("The content of the array a27:"); for (int i = 0; i < a27.length; i++) { System.out.print(a27[i] + " "); } System.out.println(); System.out.println("Done exercise 27.");

// ------> exercise 28 // this code prints all the elements of array a28 that have a value greater than 20 double[] a28 = {45.2, 13.1, 12.8, 87.4, 99.0, 100.1, 43.8, 2.4}; for (int i = 0; i < a28.length; i++) { // your code goes here

} System.out.println("Done exercise 28.");

// ------> exercise 29 // this code prints tha average of the elements of array a29 DecimalFormat df = new DecimalFormat("0.00"); int[] a29 = {45, 13, 12, 87, 99, 100, 43, 2}; double average = 0.0; for (int i = 0; i < a29.length; i++) { // your code goes here

} // ... and your code continues here System.out.println("Done exercise 29.");

// ------> exercise 30 // this code calculates and prints the dot product of two arrays // (a30[0] * b30[0] + a30[1]*b30[1] + ... + a30[n]*b30[n]) int[] a30 = {3, 7, 9}; int[] b30 = {2, 9, 4}; int dotProduct = 0; for (int i = 0; i < a30.length; i++) { // your code goes here

} // ... and your code continues here System.out.println("Done exercise 30.");

// ------> exercise 31 // this code prints the following three lines: // a31[0] is 3 // a31[1] is 6 // a31[2] is 10 int[] a31 = {3, 6, 10}; for (int i = 0; i < a31.length; i++) { // your code goes here

} System.out.println("Done exercise 31."); } }