How to write C++ program to find Fibonacci Series

Fibonacci Series or Sequence in C++

Today in C++ Tutorial we will learn How to write C++ program to find Fibonacci Series.The Fibonacci Sequence can be written as 0,1,1,2,3,5,8,13........

In this article we will discuss How to write C++ program to find Fibonacci Series or Print Fibonacci SEQUENCE using for loop in c++.

What is Fibonacci Series or Sequence

The Fibonacci numbers or Fibonacci series or Fibonacci sequence has first two numbers equal to 1 and 0 and the further each number is consist of the addition of previous two numbers.

1st number = 0
2nd number = 1
3rd number = 0+1= 1
4th number = 1+1= 2
5th number = 1+2= 3
And so on.


The Fibonacci Sequence can be written as 0,1,1,2,3,5,8,13........

Fibonacci Series in C++ Video Tutorial

Fibonacci Series program logic 

• Before writing C++ Program we must know that what is Fibonacci Series and in what sequence numbers occurs.
• After understanding mathematically Fibonacci series completely we write it in the form of C++ Program.
• As the Fibonacci series is infinite but we can't make a program that display an infinite output.
• In below program we take input the range in integer up-to which Fibonacci series will be displayed.
• For this purpose a for loop has been taken which starts from 0 and terminates less than range for example if Input is 5 then for loop will run from 0 to 4.
• In for loop if variable 'c' is less or equal than 1 in this case if statement will be executed and if 'c' is greater than 1 else part will be executed for greater than 1.

e.g., if range=2 than only
if part will run. let input is equal to 5
Before loop variables values

How to write C++ program to find Fibonacci Series

Lets have a Look at C++ program to find Fibonacci Series upto given Limit.

This C++ program use simple logic to get the concept of writing code in C++ for Fibonacci Series.

C++ program to find Fibonacci Series

#include<iostream>
using namespace std;
int main()
{
int range, first = 0, second = 1, result=0;
cout << "Enter Range for Terms of Fibonacci Sequence: ";
cin >> range;
cout << "Find Fibonicci Series upto : " << range << " Terms "<< endl;
for ( int c = 0 ; c < range ; c++ )
{
if ( c <= 1 )result = c;
else
{result = first + second;
first = second;
second = result;
}
cout <<result <<" ";
}
return 0;
}

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