Answer:
//Scanner class is imported to allow the program receive user input
import java.util.Scanner;
//Class Solution is created
public class Solution {
// The main method which is the beginning of program execution
public static void main(String args[]) {
//Scanner object 'scan' is created to accepted user input from the keyboard
Scanner scan = new Scanner(System.in);
//A prompt is displayed to the user to enter a positive number
System.out.println("Please enter a positive number: ");
//User input is stored as variable n
int n = scan.nextInt();
// An empty string is assigned to s
String s = "";
// Beginning of while loop
// The loop begin while n is a positive number
while(n > 0){
//s is concatenated with *
s+= "*";
// the value of n is reduced.
n--;
}
// The value of the string s is displayed to the screen
System.out.println(s);
}
}
Explanation:
First the Scanner class is imported, then the class Solution is created. Inside the main method, a prompt is first displayed to the user to enter a positive number. After that, a scanner object scan is created to receive the user input and assigned to n. An empty string is assigned to s.
Then the while loop repeat for each value of n greater than 0 and concatenate "*" to s.
Finally, the value of s is displayed to the user.
