Number pattern

public class Numbertriangle {
 public static void main(String[] args)
 {
 int n=4;
 int p=1;
 for (int i = 1; i <= n; i++)
 {
 if(i==1)
 {
 for (int j = 1; j <= i; j++) 
 {
 System.out.print(p++ +" ");
 }
 }
 else
 {
 for (int j = 1; j <= i; j++) 
 {
 System.out.print(p++ +" ");
 System.out.print(" ");
 }
 }
 System.out.println(" ");
 }
}
}

Output:-

1 
2 3 
4 5 6 
7 8 9 10