Hello Folks,

This is a frequently asked programming interview question to print a fibonacci series of given length.

### Fibonacci series:

Wikipedia defines it very well.

The **Fibonacci numbers** are the numbers in the following integer sequence, called the **Fibonacci sequence**, and characterized by the fact that every number after the first two is the sum of the two preceding ones:^{}

Often, especially in modern usage, the sequence is extended by one more initial term:

^{}

- We need to store numbers in variables. Since we need to store multiple variables of same type, instead of creating multiple variables, we can use an array or a collection class.
- In this post, I will use a collection class instead of arrays. In an interview if you solve a program using collections, it is really appreciated and leaves a positive impact on your interviewer.
- To find nth index number in fibonacci series, you need to access and add (n-1)th index and (n-2)th indexed element.

Java program:

Output:

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#### Author: Amod Mahajan

My name is Amod Mahajan and I am an IT employee with 6+ years of experience in Software testing and staying in Bengaluru. My area of interest is Automation testing. I started from basics and went through so many selenium tutorials. Thanks to Mukesh Otwani as his tutorials are easy and cover basics to advance. I have habit of exploring concepts by deep diving. I used to make notes. I thought of sharing my knowledge through posts and now I am here. #KeepLearning #ShareLearning