SmileBD

#include <stdio.h>
int main()
{
    int i, j, n;
    //Reads number of rows from user
    printf("Enter value of n : ");
    scanf("%d", &n);
    //Iterates over each row one by one
    for(i=1; i<=n; i++)
    {
        //Iterates over each column of the i-th row
        for(j=1; j<=n; j++)
        {
            if(i!=1 && i!=n && j!=1 && j!=n)
            {
                printf(" ");
            }
            else
            {
                //Print star for first and last row and for first and last column
                printf("*");
            }
        }
        //Move to the next line/row
        printf("\n");
    }
    return 0;
}