Permutation & Combination Calculator API

Calculate permutations (P(n,r)) and combinations (C(n,r)) for any given values of n and r.

Available on:

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Quick Start

Using JavaScript

async function callPermutation&CombinationCalculatorAPI() {
    try {
        const params = new URLSearchParams({
            n: 10,
            r: 3
        });

        const response = await fetch(`https://api.apiverve.com/v1/permutationcombination?${params}`, {
            method: 'GET',
            headers: {
                'x-api-key': 'YOUR_API_KEY_HERE'
            }
        });

        const data = await response.json();
        console.log(data);
    } catch (error) {
        console.error('Error:', error);
    }
}

callPermutation&CombinationCalculatorAPI();

Using cURL

curl -X GET "https://api.apiverve.com/v1/permutationcombination?param=value" \
  -H "x-api-key: YOUR_API_KEY_HERE"

Get your API key: https://apiverve.com

📁 For more examples, see the examples folder

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Installation

Choose your preferred programming language:

📦 NPM (JavaScript/Node.js)

npm install @apiverve/permutationcombination

View NPM Package → | Package Code →

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🔷 NuGet (.NET/C#)

dotnet add package APIVerve.API.Permutation&CombinationCalculator

View NuGet Package → | Package Code →

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🐍 Python (PyPI)

pip install apiverve-permutationcombination

View PyPI Package → | Package Code →

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🤖 Android (JitPack)

implementation 'com.github.apiverve:permutationcombination-api:1.0.0'

Package Code →

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Features

✅ Multi-platform support - Use the same API across Node.js, .NET, Python, Android, and browsers ✅ Simple authentication - Just add your API key in the request header ✅ Comprehensive documentation - Full examples and API reference available ✅ Production-ready - Used by developers worldwide

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Documentation

📚 Full API Documentation: https://docs.apiverve.com/ref/permutationcombination

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Use Cases

Common use cases for the Permutation & Combination Calculator API:

• ✅ Integration into web applications
• ✅ Mobile app development
• ✅ Data analysis and reporting
• ✅ Automation workflows
• ✅ Microservices architecture

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API Reference

Authentication

All requests require an API key in the header:

x-api-key: YOUR_API_KEY_HERE

Get your API key: https://apiverve.com

Response Format

All responses are JSON with this structure:

{
  "status": "ok",
  "data": { ... }
}

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Support & Community

• 💬 Support: https://apiverve.com/contact
• 🐛 Issues: GitHub Issues
• 📖 Documentation: https://docs.apiverve.com
• 🌐 Website: https://apiverve.com

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Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines.

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Security

For security concerns, please review our Security Policy.

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License

This project is licensed under the MIT License - see the LICENSE file for details.

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Acknowledgments

Built with ❤️ by APIVerve

Copyright © 2025 APIVerve. All rights reserved.