# Programming Videos

## Search

### Find Sum of Fibonacci Series using C, C++ Code

Write a C, C++ program to print sum of Fibonacci Series. Given a positive integer n, print the sum of Fibonacci Series upto n term.

Let's first brush up the concept of Fibonacci series.

### Fibonacci series

In Fibonacci series, the first two numbers are 0 and 1 , and the remaining numbers are the sum of previous two numbers.

Suppose, if input number is 4 then it's Fibonacci series is 0, 1, 1, 2. Now, we are finding sum of Fibonacci series so the output is  4 ( 0 + 1 + 1 + 2).

Let's take another example, this time n is 8 ( n = 4). Then the output is 33 ( 0 + 1 + 1 + 2 + 3 + 5 + 8 + 13).

Print Fibonacci series using iterative approach

Print Fibonacci series using recursion

## Program to Find Sum of Fibonacci Series - C Code

```#include <stdio.h>

int main(void) {

int i, n, first = 0, second = 1, sum = 1, third;

printf (" Enter the range \n");
scanf( "%d", &n);

for(i = 2; i < n; i++){

/* Sum of previous two element */

third = first + second;

sum = sum + third;

first = second;
second = third;

}

printf("Sum of Fibonacci series for given range is %d", sum);

return 0;
}

```

## Find Sum of Fibonacci Series - C++ Code

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

int main() {

int i, n, first = 0, second = 1, sum = 1, third;

cout << " Enter the range \n";
cin >> n;

for(i = 2; i < n; i++){

/* Print the sum of previous two element */

third = first + second;

sum = sum + third;

first = second;
second = third;

}

cout << "Sum of Fibonacci series for given range is " << sum;

return 0;
}
```

Output :

Enter the range : 8

Sum of Fibonacci series for given range is : 33

C, C++ Interview Questions

Programming questions on Strings