JAVA for Loop Triangle

class file_name{

        public static void main(String ar[]){

                      for(int i=1;i<=5;i++){


                             for(int j=1;j<=i;j++){
                                     System.out.print(j);
                             }
                                System.out.println("\n");
                      }
        }
} 

OutPut
----------------------
1
12
123
1234
12345