Hollow Square of Stars
This program prints a hollow square of stars.
Problem Statement
Write a Java program that prints a hollow square of stars with 5 rows.
Source Code
| 1 | public class HollowSquareStars { |
| 2 | public static void main(String[] args) { |
| 3 | int n = 5; |
| 4 | for(int i=1; i<=n; i++) { |
| 5 | for(int j=1; j<=n; j++) { |
| 6 | if(i==1 || i==n || j==1 || j==n) { |
| 7 | System.out.print("* "); |
| 8 | } else { |
| 9 | System.out.print(" "); |
| 10 | } |
| 11 | } |
| 12 | System.out.println(); |
| 13 | } |
| 14 | } |
| 15 | } |
Program Output
* * * * * * * * * * * * * * * *
Explanation
Both loops control the rows and columns, and the condition i==1 || i==n || j==1 || j==n prints stars only at the borders while the else branch prints spaces, creating a hollow effect that demonstrates conditional logic inside loops.