Number seriess

/*program to print number series as

1 4 9 25....100 */

#include<stdio.h>

#include<conio.h>

int main()

{

 int x=1,y=2,z,s;

 for(; x<=8; )

 {

   s=x*x;

   printf(" %d",s);

   z=x+y;

   x=y;

   y=z;

 }

 getch();
 return 0;

}

Output:1 4 9 25 64

---

/*program of print following number series

-10 -8 -6 -4 -2 0 2 4 6 8 10 */

#include<stdio.h>

#include<conio.h>

int main()

{

 int x;

 for(x=-10; x<=10;x=x+2)

    printf(" %d",x);

 getch();
 return 0;

}

Output:  -10 -8 -6 -4 -2 0 2 4 6 8 10