What is Fibonacci Series ?
Fibonacci succession arrangement or group of the numbers beginning with zero or one followed by a one, and carry on with rule that number is equivalent to the sum of prior 2 numbers.
Fibonacci series is denoted by f(n)
Eg:-
If Fibonacci starts with 0 f(0)= 0, 1, 1, 2, 3, 5, 8
If Fibonacci starts with 1 f(1)= 1, 1, 2, 3, 5, 8, 13

Program for Fibonacci Series starts with 0 i.e. f(0).

#include<stdio.h>
#include<conio.h>
void series(void);
{
    int i, n;
clrscr();
// Entering the limit for Series to print 
printf(\n Enter the limit of Fibonacci Series starting from Zero f(0):-);
scanf(%d, n);
series();
getch();
}
void series(void)
{
//if Fibonacci starts with Zero i.e. f(0) keep the present value as 0
//if Fibonacci starts with One i.e. f(1) keep the present value as 1

static int past=0; present=0; next=1;
printf(\n %d, present);
past=present;
present=next;
next=past+present;
}

Output:-

Enter the limit of Fibonacci Series starting from Zero f(0):-9
0
1
1
2
3
5
8
13
21