Program to print Floyd Triangle.

Explanation :
If n=4 then output will be
1
2 3
4 5 6
7 8 9 10

Code:

import java.util.Scanner;
public class FloydTriangle
{
public static void main(String[] args)
{
     Scanner in = new Scanner(System.in);
     System.out.println("Enter the number of rows: ");
     int r = in.nextInt();
     int n=0;
     for(int i=0; i<r; i++)
     {
        for(int j=0; j<=i; j++)
        {
           System.out.print(++n+" ");
        }
        System.out.println();
        }
     in.close();
}
}