Question

How to print pyramid pattern of numbers in Java

Answer 1

public class MyClass {
    public static void main(String args[]) {
        int rows = 5;
         
        for (int i = 1, j = 0; i <= rows; i++, j = 0) {
            int count_up = 0, count_down = 0;
            for (int space = 1; space <= rows - i; space++) {
                System.out.print("  ");
                count_up++;
            }
            while (j != 2 * i - 1) {
                if (count_up <= rows - 1) {
                    System.out.print((i + j) + " ");
                    count_up++;
                } else {
                  count_down++;
                  System.out.print((i + j - 2 * count_down) + " ");
                }
                j++;
            }
            count_up = count_down = 0;
             
            System.out.println();
        }
    }
}
   
   
   
   
/*
run:
   
        1 
      2 3 2 
    3 4 5 4 3 
  4 5 6 7 6 5 4 
5 6 7 8 9 8 7 6 5 
  
*/

 

70+ SQL courses for beginners and professionals