Hollow Concentric Pentagon with Numbers
This program prints hollow concentric pentagons using numbers.
Problem Statement
Write a Java program that prints concentric hollow pentagons with numbers up to 5 rows.
Source Code
| 1 | public class HollowConcentricPentagonNumbers { |
| 2 | public static void main(String[] args) { |
| 3 | int n=5; |
| 4 | for(int i=1; i<=n; i++) { |
| 5 | for(int j=i; j<n; j++) System.out.print(" "); |
| 6 | for(int j=1; j<=2*i+1; j++) { |
| 7 | if(j==1 || j==2*i+1 || i==n) System.out.print(i); |
| 8 | else System.out.print(" "); |
| 9 | } |
| 10 | System.out.println(); |
| 11 | } |
| 12 | } |
| 13 | } |
Program Output
1 2 2 3 3 4 4 555555555
Explanation
The same widened hollow pentagon boundary logic is used, but the printed symbol is the row index rather than a star, so each row's boundary is labeled with its own number.