**To write a recursive function to print the factorial of a number and execute it to find the factorial of 6.**#include <stdio.h>

#include <conio.h>

unsigned long fact(int);

void main()

{

unsigned long f;

int n;

clrscr();

printf(“\nEnter a number: “);

scanf(“%d”,&n);

f=fact(n);

printf(“\nFactorial of %d is %ld”,n,f);

getch();

}

unsigned long fact(int n)

{

unsigned long m;

if(n==1)

return(1);

else

m=n*fact(n−1);

return(m);

}

**The Execution of the program to find the factorial of 6 is yields:-**Enter a Number:

6

Factorial of 6 is 720

**To write a recursive function to print the Fibonacci series up to a given number and write the series up to 89.**#include <stdio.h>

#include <conio.h>

unsigned long ...

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