Home C++ Tutorial C++ Program to Find Fibonacci Series

# C++ Program to Find Fibonacci Series

### What is the Fibonacci Series?

Series 0, 1, 1, 2, 3, 5, 8, 13, 21 . . . . . . . is a Fibonacci series. In Fibonacci series, each term is the sum of the two preceding terms.

## Program for Fibonacci Series up to n number of terms

``````#include <iostream>
using namespace std;

int main() {
int n, t1 = 0, t2 = 1, nextTerm = 0;

cout << "Enter the number of terms: ";
cin >> n;

cout << "Fibonacci Series: ";

for (int i = 1; i <= n; ++i) {
// Prints the first two terms.
if(i == 1) {
cout << t1 << ", ";
continue;
}
if(i == 2) {
cout << t2 << ", ";
continue;
}
nextTerm = t1 + t2;
t1 = t2;
t2 = nextTerm;

cout << nextTerm << ", ";
}
return 0;
}``````

Output

```Enter the number of terms: 10
Fibonacci Series: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ```

## Program for Fibonacci Series up to n number of terms using Recursion

``````#include <iostream>
using namespace std;
int fib(int x) {
if((x==1)||(x==0)) {
return(x);
}else {
return(fib(x-1)+fib(x-2));
}
}
int main() {
int x , i=0;
cout << "Enter the number of terms of series : ";
cin >> x;
cout << "\nFibonnaci Series : ";
while(i < x) {
cout << " " << fib(i);
i++;
}
return 0;
}``````

Output

```Enter the number of terms of series : 14
Fibonnaci Series : 0 1 1 2 3 5 8 13 21 34 55 89 144 233 ```

Thank you for reading, If you have reached so far, please like the article, It will encourage me to write more such articles. Do share your valuable suggestions, I appreciate your honest feedback!

You Might Be Interested In