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## April 4, 2011

### C Program for Fibonacci Series using Functions

This code is shared by Shweta Jhunjhunwala, thanks for your contribution.
Share your C, C++,C# program with us we will post them here..

Fibonacci number
In mathematics, the Fibonacci numbers are the numbers in the following integer sequence:
1, 1, 2, 3, 5, 8, 13, 21, 34,55,89,144,...

A Fibonaccispiral created by drawing arcs connecting the opposite corners of squares in the Fibonacci tiling; this one uses squares of sizes
By definition, the first two Fibonacci numbers are 0 and 1, and each subsequent number is the sum of the previous two.

Sample Output:

Enter the limit:

5

1
2
3
5
8
The 5th Fibonacci number is 8

Code:
/*program for fibonacci series using functions*/
#include<stdio.h>
#include<conio.h>
void main()
{
int n;
long int i;
long int fibo(int n);
clrscr();
printf("Enter the limit:\n");
scanf("%d",&n);
i=fibo(n);
printf("\nThe %dth Fibonacci number is %ld",n,i);
getch();
}

long int fibo(int n)
{
int old_no,currnt_no,sum,i;
i=1;
old_no=0;
currnt_no=1;
while(i<=n)
{
sum=old_no+currnt_no;
old_no=currnt_no;
currnt_no=sum;
i++;
printf("\n%d",sum);
}
return(sum);
}

Hope you liked the posts, give comments if you have any doubts.. :)

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Dear sir , one doubt . 5 th number of the fibonacci series is 5. How u say the 5 th num in the fibonacci series is 8. That step i doubt. If my doubt is wrong or mistake , sorry for the distapt

good program thank you for sharing