﻿ C++ Exercises: Display the first n terms of Fibonacci series - w3resource

# C++ Exercises: Display the first n terms of Fibonacci series

## C++ For Loop: Exercise-27 with Solution

Write a program in C++ to display the first n terms of the Fibonacci series.

Visual Presentation:

Sample Solution:-

C++ Code :

``````#include <iostream> // Including input-output stream header

using namespace std; // Using standard namespace to avoid writing std::

int main() // Start of the main function
{
int prv = 0, pre = 1, trm, i, n; // Declaration of integer variables 'prv' (previous term), 'pre' (current term), 'trm' (next term), 'i' (loop counter), 'n' (number of terms)

cout << "\n\n Display the first n terms of Fibonacci series:\n"; // Displaying a message on the console
cout << "---------------------------------------------------\n";
cout << " Input number of terms to display: "; // Prompting the user to input the number of terms
cin >> n; // Reading the input value as the number of terms

cout << " Here is the Fibonacci series up to " << n << " terms: " << endl; // Displaying a message indicating the number of terms for the Fibonacci series
cout << prv << " " << pre; // Displaying the first two terms of the Fibonacci series

for (i = 3; i <= n; i++) // Loop to generate and display the Fibonacci series from the third term
{
trm = prv + pre; // Calculating the next term of the Fibonacci series
cout << " " << trm; // Displaying the next term of the Fibonacci series
prv = pre; // Updating the previous term to the current term
pre = trm; // Updating the current term to the next term
}
cout << endl; // Printing a new line after displaying the series
}
``````

Sample Output:

``` Display the first n terms of Fibonacci series:
---------------------------------------------------
Input number of terms to  display: 10
Here is the Fibonacci series upto  to 10 terms:
0 1 1 2 3 5 8 13 21 34
```

Flowchart:

C++ Code Editor: