fibonacci.cpp

[Gaminee]

A program to find fibonacci series.

[anuj840]

Fibonacci Series in C++: In case of fibonacci series, next number is the sum of previous two numbers for example 0, 1, 1, 2, 3, 5, 8 etc. The first two numbers of fibonacci series are 0 and 1.

There are two ways to write the fibonacci series program:

Fibonacci Series without recursion
Fibonacci Series using recursion

Let's see the fibonacci series program in C++ without recursion.

#include <iostream>  
using namespace std;  
int main() {  
  int n1=0,n2=1,n3,i,number;    
 cout<<"Enter the number of elements: ";    
 cin>>number;    
 cout<<n1<<" "<<n2<<" "; //printing 0 and 1    
 for(i=2;i<number;++i) //loop starts from 2 because 0 and 1 are already printed    
 {    
  n3=n1+n2;    
  cout<<n3<<" ";    
  n1=n2;    
  n2=n3;    
 }    
   return 0;  
   }  

Output:

Enter the number of elements: 10
0 1 1 2 3 5 8 13 21 34