java fibonacci code example

Example 1: fibunacci java

// WARNING: The function assumes that 'fib(0)=0' and 'fib(1)=1'
// Returns the number of the fibonacci sequence at index 'n'
public static int fib(int n) {
	if (n < 2) // No difference if '<' or '<=', because 'fib(2)=2'.
		return n;
	return fib(n-1) + fib(n-2); // Uses the recursion method for solving
}

Example 2: java fibonacci series code

public class Fibonacci {

    public static void main(String[] args) {

        int n = 10, t1 = 0, t2 = 1;
        System.out.print("First " + n + " terms: ");

        for (int i = 1; i <= n; ++i)
        {
            System.out.print(t1 + " + ");

            int sum = t1 + t2;
            t1 = t2;
            t2 = sum;
        }
    }
}

Example 3: fibonacci java

import info1.*;

public class FibonacciDemo1{

  public static void main(String[] args){

    System.out.print("Geben Sie ein Zahl an: ");

    int a = Console.in.readInt();

    System.out.println("fib("+a+") = " + fibonacci(a));

  }

  private static int fibonacci(int a){

    if (a==1||a==2) return 1;

    else return fibonacci(a-1)+fibonacci(a-2);

  }

}

Example 4: fibonacci series in java

// fibonacci series in java using while loop
public class FibonacciSeriesWhileLoop
{
   public static void main(String[] args)
   {
      int a = 1, num = 15, num1 = 0, num2 = 1;
      System.out.print("First " + num + " fibonacci sequence: ");
      while(a <= num)
      {
         System.out.print(num1 + " , ");
         int total = num1 + num2;
         num1 = num2;
         num2 = total;
         a++;
      }
   }
}

Example 5: program to get the Fibonacci series

public class Fibonacci {

    public static void main(String[] args) {

        int i = 1, n = 10, t1 = 0, t2 = 1;
        System.out.print("First " + n + " terms: ");

        while (i <= n)
        {
            System.out.print(t1 + " + ");

            int sum = t1 + t2;
            t1 = t2;
            t2 = sum;

            i++;
        }
    }
}