Fibonacci

java.lang.Object
- cpsc331.Fibonacci

```
public class Fibonacci
extends java.lang.Object
```
A class for the computation of Fibonacci numbers.
Computes the n^th Fibonacci number, F_n, when a non-negative integer n is given as a single command-line input.

Constructor Summary

Constructors
Constructor Description

Fibonacci()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static java.math.BigInteger`	`eval(int n)`	Computes the n^th Fibonacci number, F_n, throwing an IllegalArgumentException if n is negative.
`static void`	`main(java.lang.String[] args)`	The main method for this class.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Fibonacci
```
public Fibonacci()
```
- Method Detail
  - main
```
public static void main(java.lang.String[] args)
```
    The main method for this class.
    
    Parameters:
    
    args - should be a single non-negative integer n.
  - eval
```
public static java.math.BigInteger eval(int n)
```
    Computes the n^th Fibonacci number, F_n, throwing an IllegalArgumentException if n is negative.
    Precondition:
    An integer n is given as input.
    
    Postcondition:
    If n ≥ 0 then the n^th Fibonacci number, F_n, is returned as output.An IllegalArgumentException is thrown, otherwise.
    
    Parameters:
    
    n - the integer whose Fibonacci number is to be computed
    
    Returns:
    
    the n^th Fibonacci number, F_n
    
    Throws:
    
    java.lang.IllegalArgumentException - if the input is negative