README

The MathFunctions package provides a set of classes for performing various integer-based mathematical operations. It includes functionalities for calculating divisors, factorials, and identifying prime numbers within an array of integers. Additionally, it offers XML formatting for presenting calculation results.

Table of Contents

1. Requirements
2. Installation
3. Running Unit Tests
4. Usage
5. Exceptions
6. Contributing
7. License

Requirements

• PHP 8.2 or higher
• Composer (for installation)

Installation

$ composer require ktsirangelos/math-functions

Running Unit Tests

To run the unit tests for this library:

1. Clone the GitHub repository

$ git clone https://github.com/ktsirangelos/math-functions.git

1. Install dependencies

$ cd math-functions
$ composer install

1. Execute the tests

$ ./vendor/bin/phpunit tests

Usage

Calculating Divisors

To calculate the positive and negative divisors of an integer (excluding 1 and itself), use the calcDivisors() method:

use MathFunctions\IntegerCalculator;

$integerCalculator = new IntegerCalculator();
// Example usage with integer 12
$divisors = $integerCalculator->calcDivisors(12);
// Expected Output: [-6, -4, -3, -2, 2, 3, 4, 6]

Calculating Factorials

To calculate the factorial of an integer, use the calcFactorial() method:

use MathFunctions\IntegerCalculator;

$integerCalculator = new IntegerCalculator();
// Example usage with integer 5
$factorial = $integerCalculator->calcFactorial(5);
// Expected Output: 120

Identifying Prime Numbers

To find prime numbers within an array of integers and receive the results in XML format, use the calcPrimeNumbers() method:

use MathFunctions\IntegerCalculator;

$integerCalculator = new IntegerCalculator();
// Example usage with an array of integers
$primeNumbersXML = $integerCalculator->calcPrimeNumbers([2, 3, 4, 5, 6, 7]);
// Expected Output (XML string):
// <primeNumbers amount="4">
//   <result>
//     <number>2</number>
//     <number>3</number>
//     <number>5</number>
//     <number>7</number>
//   </result>
// </primeNumbers>

Formatting Calculation Results

You can format calculation results into an XML string using the toXML() method:

use MathFunctions\Utilities\ResultFormatter;

$resultFormatter = new ResultFormatter();
// Example usage with an array of even numbers
$xmlResult = $resultFormatter->toXML('evenNumbers', [2, 4, 6, 8]);
// Expected Output (XML string):
// <evenNumbers amount="4">
//   <result>
//     <number>2</number>
//     <number>4</number>
//     <number>6</number>
//     <number>8</number>
//   </result>
// </evenNumbers>

Exceptions

The functions may throw exceptions for invalid inputs. Ensure to catch and handle these exceptions appropriately in your code.

Contributing

Contributions are welcome! If you find any issues or have suggestions for improvements, feel free to open an issue or submit a pull request.

License

This package is licensed under the MIT License. See the LICENSE file for details.