Write a Java program that generates an array of Fibonacci numbers. Specification

Question

Write a Java program that generates an array of Fibonacci numbers. Specifications: Fills a one-dimensional array with the first 30 Fibonacci numbers using a calculation to generate the numbers. Note: it is not permissible to initialize the array explicitly with the Fibonacci series’ first 30 numbers! Prints the Fibonacci numbers in the array Prompts the user to input an (integer) number between 1 and 30 (inclusive) and prints in response to the user entry: The nth Fibonacci number is X, where n is the number input by the user and X is the Fibonacci number in the nth position. (Remember that array indexes for the elements of the array start at 0) Checks that the user has not input a number lower than 1 or higher than 30 You can check if you have the right numbers here: http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibtable.html

Explanation / Answer

import java.util.Scanner;

public class Fibonacci

{

   public static void main (String args[])

   {

       int n = 30;

       int f[] = new int[n];

       f[0] = 1;

       f[1] = 1;

       for(int i=2; i<30; i++){

           f[i] = f[i-1] + f[i-2];

       }

       Scanner sc = new Scanner(System.in);

       System.out.print("Enter a number in range (1-30");

       int num = sc.nextInt();

       while(num<1 || num>30){

           System.out.print("Enter a number in range (1-30): ");

           num = sc.nextInt();

       }

       System.out.println(num+" fibonacci number is: "+f[num-1]);

       sc.close();

   }

}

/*

Sample run:

Enter a number in range (1-30): 10

10 fibonacci number is: 55

*/

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