C Program to Sum of Fibonacci Series

In this tutorial, i am going to show you how to find sum of fibonacci series with the help of for loop, while loop and function in c programs.

All C Programs to Sum of Fibonacci Series

  • C Program to Sum of Fibonacci Series using For Loop
  • C Program to Sum of Fibonacci Series using While Loop
  • C Program to Sum of Fibonacci Series using Function

C Program to Sum of Fibonacci Series using 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 = %d\n", sum);
}

The result of the above c program; is as follows:

Please Enter the Range Number: 10
0 1 1 2 3 5 8 
The Sum = 20

C Program to Sum of Fibonacci Series using While Loop

#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);
}

The result of the above c program; is as follows:

Enter Maximum Number for Fibonacci Series = 5
First 5 Fibonacci Series Numbers:
0 1 1 2 3 5 
The Sum of Fibonacci Series Numbers = 12

C Program to Sum of Fibonacci Series using Function

#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 = ");
   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 = %d\n", sum);
}

The result of the above c program; is as follows:

Enter Maximum Number = 5
Fibonacci Series Numbers up to 5:
0   1   1   2   3   
The Sum = 7

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