Fibonacci in Every Language

Published on 01 November 2018 (Updated: 02 May 2020)

Fibonacci in Every Language

In this article, we’ll tackle the Fibonacci problem, its requirements, and how to test it.

Description

In mathematics, the Fibonacci numbers are the numbers in the following integer sequence, called the Fibonacci sequence, and characterized by the fact that every number after the first two is the sum of the two preceding ones:

1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ...

Requirements

For this sample program, each solution should leverage dynamic programming to produce this list up to the nth term. For instance, ./fib 5 on the command line should output

1: 1
2: 1
3: 2
4: 3
5: 5

In addition, there should be some error handling for situations where the user doesn’t supply any input or the user supplies input that is not a number (i.e. ./fib or ./fib hello, respectively).

Testing

Some tests for your program are:

Description Input Output
No Input   “Usage: please input the count of fibonacci numbers to output”
Empty Input ”” “Usage: please input the count of fibonacci numbers to output”
Invalid Input: not a number word “Usage: please input the count of fibonacci numbers to output”
Sample Input: 0 0  
Sample Input: 1 1 1: 1
Sample Input: 2 2 1: 1
2: 2
Sample Input: 5 5 1: 1
2: 2
3: 3
4: 4
5: 5
Sample Input: 10 10 1: 1
2: 2
3: 3
4: 4
5: 5
6: 6
7: 7
8: 8
9: 9
10: 10

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