# C program to find the Sum of Fibonacci Series

Write a C program to find the sum of Fibonacci series numbers using a while loop. In this c example, the whole loop iterate numbers from 0 to n to print Fibonacci numbers and find the sum of those Fibonacci series numbers.

```#include<stdio.h>

int main()
{
int Number, First = 0, Second = 1, Next = 0, sum = 0;

printf("Enter Maximum Number for Fibonacci Series = ");
scanf("%d", &Number);

printf("First %d Fibonacci Series Numbers:\n", Number);

while( First <= Number)
{
printf("%d ", First);
sum = sum + First;
Next = First + Second;
First = Second;
Second = Next;
}
printf("\nThe Sum of Fibonacci Series Numbers = %d\n", sum);
}
```

## C program to find the Sum of Fibonacci Series using the for loop

```#include <stdio.h>
int main()
{
int Number, Next, Second = 1, sum = 0;

printf("\n Please Enter the Range Number: ");
scanf("%d",&Number);

for(int First = 0; First <= Number;)
{
printf("%d ", First);
sum = sum + First;
Next = First + Second;
First = Second;
Second = Next;
}
printf("\nThe Sum of Fibonacci Series Numbers = %d\n", sum);
}
```
`````` Please Enter the Range Number: 25
0 1 1 2 3 5 8 13 21
The Sum of Fibonacci Series Numbers = 54``````

In this c example, the fibonacciSeries recursive function calculates the sum of Fibonacci series numbers by calling it recursively.

```#include<stdio.h>

int fibonacciSeries(int Number)
{
if ( Number == 0 )
return 0;
else if ( Number == 1 )
return 1;
else
return ( fibonacciSeries(Number - 1) + fibonacciSeries(Number - 2) );
}

int main()
{
int Number, i = 0, j, sum = 0;

printf("\nEnter Maximum Number for Fibonacci Series = ");
scanf("%d", &Number);

printf("Fibonacci Series Numbers up to %d:\n", Number);

for ( j = 0 ; j < Number; j++ )
{
printf("%d   ", fibonacciSeries(j));
sum = sum + fibonacciSeries(j);
}
printf("\nThe Sum of Fibonacci Series Numbers = %d\n", sum);
}```
``````Enter Maximum Number for Fibonacci Series = 20
Fibonacci Series Numbers up to 20:
0   1   1   2   3   5   8   13   21   34   55   89   144   233   377   610   987   1597   2584   4181
The Sum of Fibonacci Series Numbers = 10945``````