We all know about the famous Fibonacci (was the name given to Leonardo Pisano) Series . In this series each number is the sum of the two preceding ones, starting from 0 and 1. That is $$F_0$$=0 and $$F_1$$=1

and

$$F_n$$=$$F_{n−1}$$+$$F_{n−2}$$ for n>1

In some old books $$F_0$$ is omitted and the the entire things starts with $$F_1$$and $$F_2$$that is $$F_1$$=$$F_2$$=1

so it starts like this 0,1,1,2,3,5,8,13,……..

Now in order to find the 30th term of the above mentioned series we write a program in C and that is

1. #include <stdio.h>
2.  Void main ()
3. {
4.  long int i, n, t1 = 0, t2 = 1, nextTerm;
5.  printf("Enter the number of terms: ");
6.  scanf("%li", &n);
7.  printf("Fibonacci Series: ");
8.  for (i = 1; i <= n; ++i)
9.  {
10.  printf("%d, ", t1);
11.  nextTerm = t1 + t2;
12.  t1 = t2;
13.  t2 = nextTerm;
14.  }
15.  }

After compiling the above program in C , we enter the value of 𝑛n as 30 and the output is

0,1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1597,2584,4181,6765,10946,17711,28657,46368,75025,121393,196418,317811,5142290,1,1,2,3,5,8,13,21,34,55,89,144,233,377,610,987,1597,2584,4181,6765,10946,17711,28657,46368,75025,121393,196418,317811,514229

Here 514229 is the 30th term of the Fibonacci Series