Star Zig-Zag Wave
This program prints stars in zig-zag wave form.
Problem Statement
Write a Java program that prints zig-zag wave of stars with 3 rows and 15 columns.
Source Code
| 1 | public class StarZigZagWave { |
| 2 | public static void main(String[] args) { |
| 3 | int rows = 3, cols = 15; |
| 4 | for(int i=1; i<=rows; i++) { |
| 5 | for(int j=1; j<=cols; j++) { |
| 6 | if((i+j)%4==0 || (i==2 && j%4==0)) System.out.print("*"); |
| 7 | else System.out.print(" "); |
| 8 | } |
| 9 | System.out.println(); |
| 10 | } |
| 11 | } |
| 12 | } |
Program Output
* * * * * * * * * * * * * * * * *
Explanation
The condition (i+j)%4==0, combined with the middle-row special case, places stars in a repeating wave pattern across 15 columns, showing how modular arithmetic aligns a wider zig-zag wave.