Pattern00027.c

/*

1
2 3
4 5 6
7 8 9 10
11 12 13 14 15

*/

#include <stdio.h>
int main()
{
    int i, j, num = 1;
    for (i = 1; i <= 5; i++)
    {
        for (j = 1; j <= 5; j++)
        {
            if (j<=i)
            {
                printf("%d ", num);
                num++;
            }
            else
                printf(" ");
        }
        printf("\n");
    }
}