Triangle Format

Write a Java program to print the numbers in triangle format?

/*Q. Write a Program to print the Numbers in Triangle format?*/
public class NumbersInTriangle {
     public static void main(String[] args) {
           int rows = 10; /* give input here*/         
           for (int i = 1; i <= rows; i++) {
                int number = 1;
                for (int j = 1; j <= i; j++) {
                     System.out.format("%2d",number++);                   
                }
                System.out.println();
           }
     }
}