# Fibonacci series Example Program In C++

## Definition

In mathematics, the Fibonacci numbers or Fibonacci series or Fibonacci sequence are the numbers in the following integer sequence:

``1  1  2  3  5  8  13  21  34  55  89  144 ......``

By definition, the first two numbers in the Fibonacci sequence are 0 and 1, and each subsequent number is the sum of the previous two.

## Fibonacci series Example Program

``````/*  Example Program For Fibonacci Series Using Loop In C++
little drops @ thiyagaraaj.com

Coded By:THIYAGARAAJ MP             */

#include<iostream>
#include<conio.h>

using namespace std;

int main() {

// Variable Declaration
int counter, n;
long last = 1, next = 0, sum;
// Get Input Value
cout << "Enter the Number :";
cin>>n;

//Fibonacci Series Calculation
while (next < n / 2) {
cout << last << "  ";
sum = next + last;
next = last;
last = sum;
}

// Wait For Output Screen
getch();
return 0;
}``````

## Sample Output

``````Enter the Number :300
1
1
2
3
5
8
13
21
34
55
89
144
233
``````