C program to print hollow right triangle star pattern

/**

 * C program to print hollow right triangle star pattern

*
*   *
*      *
*         *
*            *
*               *
*                   *
*   *   *   *      *

*/

#include <stdio.h>

#include<conio.h>

void main()

{

    int i, j, rows;

    /* Input rows from user */

    printf("Enter number of rows: ");

    scanf("%d", &rows);

    for(i=1; i<=rows; i++)

    {

        for(j=1; j<=i; j++)

        {

            /*

             * Print star for first column(j==1),

             * last column(j==i) or last row(i==rows).

             */

            if(j==1 || j==i || i==rows)

            {

                printf("*");

            }

            else

            {

                printf(" ");

            }

        }

        printf("\n");

    }

    getch();

}

source: codeforwin.org