Answer:
//import the Scanner class
import java.util.Scanner;
//Begin class definition
public class Powers{
//Begin the main method
public static void main(String []args){
//Create an object of the Scanner class
//to allow for user inputs
Scanner input = new Scanner(System.in);
//Prompt the user to enter the largest of the whole number
System.out.println("Enter the largest of the whole numbers to use");
//Receive user input using the Scanner object
//and store in an integer variable
int n = input.nextInt();
//Create a two-dimensional array using the user input
int [][] powerlist = new int [n][4];
//Create an outer for loop
//to loop as many times as the number entered by the user
for (int i = 0; i < n; i++){
//Create an inner loop to find
//the powers of each of the numbers
for(int j = 0; j < 4; j++){
//Typecast the value returned from the Math.pow() function
powerlist[i][j] = (int) Math.pow((i+1), (j+1));
}
}
//Print out the header of the table
//\t will print a tab character.
System.out.println("n" + "\t\t" + "n^2" + "\t\t" + "n^3" + "\t\t" + "n^4");
//Print out the elements in the two dimensional array
for (int i = 0; i < powerlist.length; i++){
for(int j = 0; j < powerlist[i].length; j++){
//Separate each term by two tabs
System.out.print(powerlist[i][j] + "\t\t");
}
System.out.println();
}
}
}
Sample Output:
Enter the largest of the whole numbers to use
4
n n^2 n^3 n^4
1 1 1 1
2 4 8 16
3 9 27 81
4 16 64 256
Explanation:
The code above has been written in Java and it contains comments explaining important lines in the code. Please go through the comments.
For clarity, the actual lines of code have been written in bold face to distinguish them from comments.
Screenshots of the code and a sample output have also been attached to this response.
The program is an illustration of loops.
Loops are used to perform repetitive and iterative operations.
The program in Java where comments are used to explain each line s as follows:
import java.util.*;
public class Main{
public static void main(String []args){
//This creates a scanner object
Scanner input = new Scanner(System.in);
//This prompts the user for the largest integer
System.out.print("Largest:");
//This gets input for the prompt
int n = input.nextInt();
//This prints the output header
System.out.println("n" + "\t" + "n^2" + "\t" + "n^3" + "\t" + "n^4");
//This iterates from 1 to n
for (int i = 1; i <= n; i++){
//This iterates through the powers
for(int j = 0; j < 4; j++){
//This displays each output
System.out.print((int) Math.pow((i), (j+1))+"\t");
}
//This prints a new line
System.out.println();
}
}
}
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