Question

write a menu driven program to run the following series using loop in bluej or java :- (i) Fibonacci series (ii) Tribonacci series

Answer 1

The Fibonacci sequence is a series of numbers where a number is the sum of previous two numbers. Starting with 0 and 1, the sequence goes 0, 1, 1, 2, 3, 5, 8, 13, 21, and so on. Here we will write three programs to print fibonacci series 1) using for loop 2) using while loop 3) based on the number entered by user

To understand these programs, you should have the knowledge of for loop and while loop.

If you are new to java, refer this java programming tutorial to start learning from basics.

Example 1: Program to print fibonacci series using for loop

public class JavaExample { public static void main(String[] args) { int count = 7, num1 = 0, num2 = 1; System.out.print("Fibonacci Series of "+count+" numbers:"); for (int i = 1; i <= count; ++i) { System.out.print(num1+" "); /* On each iteration, we are assigning second number * to the first number and assigning the sum of last two * numbers to the second number */ int sumOfPrevTwo = num1 + num2; num1 = num2; num2 = sumOfPrevTwo; } } }

Answer 2

Answer:

(i) fibonacci-

import java.util.*;

public class fibonacci

{

public static void main()

{

    Scanner sc=new Scanner (System.in);

    int a,b,c;

    System.out.println("Enter a no. for fibonacci series=");

    a=sc.nextInt();

    b=(a+1);

    c=a+b;

    System.out.println(+c);

    a=b;

    b=c;

    c=a+b;

    System.out.println(+c);

    a=b;

    b=c;

    c=a+b;

    System.out.println(+c);

    a=b;

    b=c;

    c=a+b;

    System.out.println(+c);

    a=b;

    b=c;

    c=a+b;

    System.out.println(+c);

    a=b;

    b=c;

    c=a+b;

    System.out.println(+c);

   }

}

(ii) tribonacci-

import java.util.*;

public class tribonacci

{

   public static void main()

   {

       Scanner sc = new Scanner (System.in);

       int a=0,b=1,c,d;

       c=a+b;

       d=a+b+c;

       System.out.println(+a);

       System.out.println(+b);

       System.out.println(+c);

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

       a=b;

       b=c;

       c=d;

       d=a+b+c;

       System.out.println(+d);

   }

}