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Generation of Fibonacci Sequence using Recursion.

Write a recursive function to obtain the first 25 numbers of a Fibonacci sequence. In a Fibonacci sequence the sum of two successive terms gives the third term. Following are the first few terms of the Fibonacci sequence:1 1 2 3 5 8 13 21 34 55 89 ...

**#include<stdio.h>**

main()

**{**

**static** **int** prev_number=0, number=1; // **static**: so value is not lost

**int** fibonacci (**int** prev_number, **int** number);

printf ("Following are the first 25 Numbers of the Fibonacci Series:\n");

printf ("1 "); //to avoid complexity

fibonacci (prev_number,number);

**}**

fibonacci (**int** prev_number, **int** number)

**{**

**static** **int** i=1; //i is not 0, cuz 1 is already counted in main.

**int** fibo;

**if** (i==25)

**{**

printf ("\ndone"); //stop after 25 numbers

**}**

**else**

**{**

fibo=prev_number+number;

prev_number=number; //important steps

number=fibo;

printf ("\n%d", fibo);

i++; // increment counter

fibonacci (prev_number,number); //recursion

**}**

**}**

## 36 comments:

Thanks for this example!

MRA

NextDawn C and C++ Tutorials

Thanks. :)

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it should be more clear

thanks

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Thanks for the idea

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many many thanx for example....please continue providing more examples in functions

thanks.. very easy coding for this program..easily understable..

many many thanks for the example

#include

#include

int fabo(int);

int main()

{

int result=0,a=1,b=1,c,i;

printf("enter upto which you want to generate the series");

scanf("%d",&c);

for(i=c-1;i>=0;i--)

{result=fabo(c-i);

printf(" %d",result);}

getch();

}

int fabo(int n)

{

int i;

if (n==1)

return 1;

if(n==2)

return 1;

else

return (fabo(n-1)+fabo(n-2));

getch();

}

Rajat its good...

thanks you so much this helped me a lot.. :D

Thanks for the example very well explained. Infact this site sholud be opened first when the google is surfed

the variable a=1 and b=1????is for???

This is awesome post and good imformation

C interview questions

#include

#include

int fabo(int);

int main()

{

int result=0,c,i;

printf("enter how many no. you see:");

scanf("%d",&c);

for(i=c-1;i>=0;i--)

{result=fabo(c-i);

printf(" %d",result);}

getch();

}

int fabo(int n)

{

int i;

if (n==1)

return 1;

if(n==2)

return 1;

else

return (fabo(n-1)+fabo(n-2));

}

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#include

#include

main()

{

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}

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Hi, Nice Program to calculate the factorial of a number. Use the concept of recursion

instead of using loops. .Thanks, its really helped me......

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