Fibonacci Series in Java - Easy Java Program with Explanation

Fibonacci Series in Java

The Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones, starting from 0 and 1. In this post, we'll see how to generate the Fibonacci series using Java.

What is Fibonacci Series?

It starts with 0, 1, and the next numbers in the sequence are formed by adding the previous two numbers:

0, 1, 1, 2, 3, 5, 8, 13, 21...

Java Program to Print Fibonacci Series

public class FibonacciExample {
    public static void main(String[] args) {
        int n = 10;
        int a = 0, b = 1;

        System.out.print("Fibonacci Series up to " + n + " terms: ");
        for (int i = 1; i <= n; i++) {
            System.out.print(a + " ");
            int next = a + b;
            a = b;
            b = next;
        }
    }
}

Output

Fibonacci Series up to 10 terms: 0 1 1 2 3 5 8 13 21 34

Explanation

• We start with two variables a and b holding 0 and 1.
• Each new term is calculated as next = a + b.
• We update a and b in each iteration to continue the series.

Conclusion

This is one of the most common Java programs asked in interviews. It’s simple and helps in understanding loops and variable manipulation.

🥈 Master Maximum & Comparison Logic in Java Arrays

Finding the second largest element in an array is a classic Java interview problem that tests your understanding of array traversal, comparisons, and edge-case handling. Strengthen your array problem-solving skills by exploring these closely related Java programs and interview resources.

🧠 Java Coding Round Questions

Practice array-based logic problems frequently asked in coding rounds.

✅ Check if Array Is Sorted

Verify array order before applying sorting-based approaches.

🔍 Find Duplicates in Array

Handle duplicate values while finding unique maximums.

🚫 Remove Duplicates from Array

Remove repeated elements before applying max-value logic.

🔄 Reverse Array

Strengthen array traversal and index manipulation skills.

📊 Sort Array Without Built-ins

Sorting is one approach to find second-largest values.

📦 Java Collections Interview Questions

Understand how collections simplify max-value problems.

🎯 Java Interview Questions (Freshers)

Common interview questions involving array comparisons.

🧪 Advanced Java Programs (Real-World)

Apply max and comparison logic in real-world Java scenarios.