---
title: "Discussion on \"main Function Variants, Unused Variables & Real-World Use Cases\" | Hashnode"
description: "Discussion on \"main Function Variants, Unused Variables & Real-World Use Cases\". So far, you’ve learned:\n\nHow programs receive input (argc, argv)\n\nHow to access and process arguments\n\n\nNow we complete the picture.\nThis lesson answers three important questions:\n\n\nWhy does main some"
url: "https://hashnode.com/posts/main-function-variants-unused-variables-real-world-use-cases/69cc9d6ee4688e4edd8992f7"
---

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Discussion

# [main Function Variants, Unused Variables & Real-World Use Cases](https://blog.ehoneahobed.com/main-function-variants-unused-variables-real-world-use-cases?utm_source=hashnode&utm_medium=feed)

So far, you’ve learned: How programs receive input (argc, argv) How to access and process arguments Now we complete the picture. This lesson answers three important questions: Why does main some

Apr 1 · 4 min read · blog.ehoneahobed.com  
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## Written by

[Dr. Ehoneah Obed](https://hashnode.com/@ehoneahobed)

@ehoneahobed

  
[View profile](https://hashnode.com/@ehoneahobed)

Software and AI engineer, health informatician, and registered pharmacist. I write about what I build and what I learn.

Heya! 👋 I love helping people, and one of the best ways I do this is by sharing what I learn and build. I started as a pharmacist at a tertiary hospital in Northern Ghana, where I saw how much technology could improve healthcare. That sparked my interest in digital health. I taught myself to code, then joined the ALX Software Engineering program, which became a turning point. I went on to complete a Master of Health Informatics at the University of Toronto. Today I am a software and AI engineer and a health informatician, and I practise remotely as a Digital Health Pharmacist. I combine clinical experience with technical skills to build tools that solve real problems in health and beyond, and I write here about what I build and what I learn.

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