Right angle triangle using the number

package star;

import java.util.Scanner;

public class num1 {

public static void main(String[] args) {
int n, c, d;
     Scanner in = new Scanner(System.in);

     System.out.println("Enter the number of rows of triangle you want");
     n = in.nextInt();

     System.out.println("Triangle :-");

     for ( c = 1 ; c <= n ; c++ )
     {
        for ( d = 1 ; d <= c ; d++ )
        {
           System.out.print(" "+d);
         
        }

        System.out.println();
     }
  }
}