Back to the Program-A-Day homepage
Problem
Write a complete Java program Fibonacci that:
- prompts the user to enter an input n and cast it to integer
- get the nth fibonacci numbers using FOR loop, based on the user's input
- prints out the nth fibonacci number, using JOptionPane.showMessageDialog method.
Note that the fibonacci sequence is F(0) = 1, F(1) = 1, F(n) = F(n-1) + F(n-2) for n > 1.
Example: F(5) = 1, 1, 2, 3, 5, 8
Your output should look something like
"The 5th number of the fibonacci sequence is 5."
You may assume that the user always enters correct intenger format.
|
|
...by students
Taken from http://www.flickr.com/photos/daniello/565304023/
An image or By Students section
|
Solution
|
Code
Solution Code
import javax.swing.JOptionPane;
public class Fibonacci
{
public static void main(String[] args)
{
int current = 1;
int previous = 0;
int n = Integer.parseInt(JOptionPane.showInputDialog("Please enter n"));
for(int i = 0; i < n; i++)
{
int temp = previous;
previous = current;
current = temp + previous;
}
System.out.println("The " + n + "th Fibonacci number is " + current);
}
}
|
Back to the Program-A-Day homepage
