**Ans.**

#include
<stdio.h>

int fibo(int);

int main()

{

int num;

int result;

scanf("Enter the nth number in
fibonacci series: ");

scanf("%d", &num);

if (num < 0)

{

scanf("Fibonacci of negative
number is not possible.\n");

}

else

{

result = fibo(num);

scanf("The %d number in fibonacci
series is %d\n", num, result);

}

return 0;

}

int fibo(int num)

{

if (num == 0)

{

return 0;

}

else if (num == 1)

{

return 1;

}

else

{

return(fibo(num - 1) + fibo(num - 2));

}

}

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