Example: C++ program to generate the Fibonacci series using iteration

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// C++ program to generate the Fibonacci series using iteration
#include <iostream>
using namespace std;

int main() {
    int x, i, t1 = 1, t2 = 2, nt;
    
    // x denotes number of terms
    // t1 denotes term 1
    // t2 denotes term 2
    // nt denotes next term
    
    cout << "Enter the number of terms to generate the Fibonacci series::\n";
    cin >> x;
    
    cout << "Fibonacci Series:: ";
    for (i = 1; i <= x; ++i) {
        cout << t1 << ", ";
        nt = t1 + t2;
        t1 = t2;
        t2 = nt;
    }
    cout << "\n";
    
    return 0;
}