--- title: The SOLID Principles — Armakuni description: The SOLID principles are the foundation of writing great object-oriented software. image: https://uk.armakuni.com/hubfs/Imported_Blog_Media/100w-Mar-21-2024-09-22-29-7108-AM.png --- [![Compant Logo](https://cdn.prod.website-files.com/66715ca64f9c8cdfe857c1d3/6671668f339890cbef391d80_Company%20Logo.png)](https://www.armakuni.com/) What We Do ![Dropdown Arrow](https://cdn.prod.website-files.com/66715ca64f9c8cdfe857c1d3/66726ee2fd05cfd52e783a20_Dropdown%20White%20Arrow.svg) Who We Help [Finance](https://www.armakuni.com/who-we-help/finance/) [Healthcare](https://www.armakuni.com/who-we-help/healthcare/) [Supply Chain](https://www.armakuni.com/who-we-help/supply-chain/) [Telecom](https://www.armakuni.com/who-we-help/telecom/) [Entertainment and Marketing](https://www.armakuni.com/who-we-help/entertainment-and-marketing/) Where We Help [Consulting](https://www.armakuni.com/where-we-help/consulting/) [Accelerated Delivery](https://www.armakuni.com/where-we-help/accelerated-delivery/) [Cloud with AWS](https://www.armakuni.com/where-we-help/cloud-with-aws/) [Gen AI and ML](https://www.armakuni.com/where-we-help/gen-ai-and-ml/) [Data Engineering](https://www.armakuni.com/where-we-help/data-engineering/) [Client Outcomes](https://www.armakuni.com/client-outcomes/) [About](https://www.armakuni.com/about-us/) [The AK Way](https://www.armakuni.com/the-ak-way/) [Insights](https://www.armakuni.com/insights/) [Get In Touch](https://www.armakuni.com/contact-us) Written by Armakuni Jun 29, 2024 # The SOLID Principles ## Table of Content ![66cc264742ee0c42e4436149_DevOpsDays london](https://uk.armakuni.com/hs-fs/hubfs/66cc264742ee0c42e4436149_DevOpsDays%20london.png?width=1400&height=900&name=66cc264742ee0c42e4436149_DevOpsDays%20london.png)     > *Note: This was originally written and published on the internal Armakuni Slack, by* > > [Tom Oram](https://medium.com/u/8b62695f2784?source=post_page-----629df86dd84--------------------------------) > >   I think the SOLID principles are the foundation of writing great object-oriented software, so I’m starting with them. While this may be something you already know, the aim of the topics of the day is to put everyone on the same page and to start a discussion. The SOLID principles of OOP are five principles which should be applied when writing object-oriented code to ensure that the coupling is low, the cohesion is high, the code is testable and extensible, and the ability to be agile is maximised. The SOLID Principles are: - **The Single Responsibility Principle (SRP)** - **The Open/Closed Principle (OCP)** - **The Liskov Substitution Principle (LSP)** - **The Interface Segregation Principle (ISP)** - **The Dependency Inversion Principle (DIP)** The next five topics will look at each of these in turn. *Q. How much do you think about these principles while writing code?* [![](https://static1.squarespace.com/static/images/5757c8b8ba67a84e48979dde/100w) Armakuni](https://uk.armakuni.com/armakuni-blog?author=5627c4b0e4b0c0ef762035d7)   ## Got Questions? Reach out, and we’ll have answers for you pronto. 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