In this tutorial, we will write a java program to print sandglass number pattern. Before that, you may go through the following topic in java.
The program below takes a user input for the number of rows needed and then in decreasing order of the first half is printed and then the increasing order of the second half of the sandglass is printed.
This is an hourglass pattern program in java or you can say sandglass pattern program using number.
Hourglass Number Pattern in Java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | import java.util.Scanner; public class Main { public static void main(String[] args) { int rows, i, j, k; Scanner sc = new Scanner(System.in); System.out.print("Enter the number of rows: "); rows = sc.nextInt(); //upper half for (i = 1; i <= rows; i++) { for (k = 1; k < i; k++) System.out.print(" "); for (j = i; j <= rows; j++) System.out.print(j + " "); System.out.println(); } //lower half for (i = rows - 1; i >= 1; i--) { for (k = 1; k < i; k++) System.out.print(" "); for (j = i; j <= rows; j++) System.out.print(j + " "); System.out.println(); } } } |
Output:
