This is the fibonacci series program , which print the series upto 15 numbers , you can increase or decrease variable n upto how many you choose to print . Happy coding !

Fibonacci.c

#include<stdio.h>

int main(void){
	int n=15,i,f1=0,f2=1, nextItem=0; // initializing the variables

	for(i=0;i<n;i++){
		printf("%d ", f1); // printing variables
		nextItem= f1+f2;  // fibo algo
		f1=f2;              // exchanging the values  
		f2= nextItem;
	}
	
}