# include <stdio.h>

//
//  Program 5.3a, Stephen Kochan, Programming in C.
//

int main ( void )
{
  int n, triangularNumber;

  printf ( "\n" );
  printf ( "Table of Triangular Numbers:\n" );
  printf ( "\n" );
  printf ( " n    Sum from 1 to n\n" );
  printf ( "--    ---------------\n" );
  printf ( "\n" );

  triangularNumber = 0;
  for ( n = 1; n <= 10; n = n + 1 )
  {
    triangularNumber = triangularNumber + n;
    printf ( "%2i     %3i\n", n, triangularNumber );
  }



  return 0;
}