/* Pattern problem
   1
   2 3
   4 5 6
   7 8 9 10
   ...
*/

#include  <stdio.h>
#include  <conio.h>

void main()
{
    int  i, j, k ;
    clrscr() ;
    printf("Required pattern is as follows: \n") ;
    k=1 ;
    for(i=1 ; i<=4 ; i++)
        {
            for(j=1 ; j<=i ; j++)
                printf("%d ", k++) ;
            printf("\n") ;
        }
    getch() ;
}

/*
Output:

Required pattern is as follows:
1
2 3
4 5 6
7 8 9 10
*/