1- By using C++ programming language write a program which displays the Fibonacci Series numbers. Note: The number of elements is taken as in input from the user Hint: The Fibonacci Sequence: 0,1,1,2,3,5,8,13,21,34,55.. .

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Explanation:

Example 1.

#include <iostream>

using namespace std;

int main() {

   int n, t1 = 0, t2 = 1, nextTerm = 0;

   cout << "Enter the number of terms: ";

   cin >> n;

   cout << "Fibonacci Series: ";

   for (int i = 1; i <= n; ++i) {

       // Prints the first two terms.

       if(i == 1) {

           cout << t1 << ", ";

           continue;

       }

       if(i == 2) {

           cout << t2 << ", ";

           continue;

       }

       nextTerm = t1 + t2;

       t1 = t2;

       t2 = nextTerm;

       cout << nextTerm << ", ";

   }

   return 0;

}

Example 2.

#include <iostream>

using namespace std;

int main() {

   int t1 = 0, t2 = 1, nextTerm = 0, n;

   cout << "Enter a positive number: ";

   cin >> n;

   // displays the first two terms which is always 0 and 1

   cout << "Fibonacci Series: " << t1 << ", " << t2 << ", ";

   nextTerm = t1 + t2;

   while(nextTerm <= n) {

       cout << nextTerm << ", ";

       t1 = t2;

       t2 = nextTerm;

       nextTerm = t1 + t2;

   }

   return 0;

}