Java Program Number Triangle Pattern Five

  • Java program to print number triangle pattern five using for loop.
Sample Output,
1 2 3 4 5 
1 2 3 4 
1 2 3 
1 2 
1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5

Java program to print number triangle pattern five

package com.tcc.java.programs;

public class PatternFour {
    public static void main(String[] arg) {
        int rows, i, j;
        rows = 5;
        // Printing upper triangle
        /* Outer for loop prints one row in every iteration */
        for (i = 1; i <= rows; i++) {
            /* Inner for loop prints numbers of one row */
            for (j = 1; j <= rows - i + 1; j++) {
                System.out.print(j + " ");
            }
            System.out.print("\n");
        }
        // Printing Lower Triangle
        /* Outer for loop prints one row in every iteration */
        for (i = 2; i <= rows; i++) {
            /* Inner for loop prints numbers of one row */
            for (j = 1; j <= i; j++) {
                System.out.print(j + " ");
            }
            System.out.print("\n");
        }
    }
}
Output
1 2 3 4 5 
1 2 3 4 
1 2 3 
1 2 
1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5