Write a C program to display a triangle of digits as follows. Number of rows is entered by keyboard....

1                2  2              3  3  3            4  4  4  4          5  5  5  5  5              6  6  6  6  6  6 #include<stdio.h>  int main()    {      int  i, j, sp, n;      printf( "How many line: " );      scanf( "%d" ,&n);      for(i=1;i<=n;i++)         {           printf( "\n" );           for(sp=n+1;sp>i;sp--)              printf( " " );           for(j=1;j<=i;j++)              printf( "%2d" ,i);          }       return 0;    }