The following is an example to find fibonacci series using iteration.
#include <iostream> using namespace std; void fib(int num) { int x = 0, y = 1, z = 0; for (int i = 0; i < num; i++) { cout << x << " "; z = x + y; x = y; y = z; } } int main() { int num; cout << "Enter the number : "; cin >> num; cout << "\nThe fibonacci series : " ; fib(num); return 0; }
Enter the number : 10 The fibonacci series : 0 1 1 2 3 5 8 13 21 34
In the above program, the actual code is present in function fib() to calculate the fibonacci series.
void fib(int num) { int x = 0, y = 1, z = 0; for (int i = 0; i < num; i++) { cout << x << " "; z = x + y; x = y; y = z; } }
In the main() function, a number is entered by the user. The function fib() is called and fibonacci series is printed as follows −
cout << "Enter the number : "; cin >> num; cout << "\nThe fibonacci series : " ; fib(num);