Fibonacci Series Program In C++ Notes+Coding by Digitalise Data

Fibonacci Series in C++

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, 13, 21 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

Fibonaccci Series in C++ without Recursion

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

1. #include<iostream.h>
2. #include<conio.h> 
3. void main() {  
4.   int n1=0,n2=1,n3,i,number;    
5.  cout<<"Enter the number of elements: ";    
6.  cin>>number;    
7.  cout<<n1<<" "<<n2<<" "; //printing 0 and 1    
8.  for(i=2;i<number;++i) //loop starts from 2 because 0 and 1 are already printed    
9.  {    
10.   n3=n1+n2;    
11.   cout<<n3<<" ";    
12.   n1=n2;    
13.   n2=n3;    
14.  }    
15.   getch(); 
16.    }  

Output:

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