--- title: Clean Code: 7 tips to write clean functions | daily.dev description: Writing clean functions ensures that your code is readable, maintainable, and less prone to errors. Key tips include keeping functions small and well-named,... canonical: https://daily.dev/posts/clean-code-7-tips-to-write-clean-functions-yxi7yixdl twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Clean Code: 7 tips to write clean functions | daily.dev og:description: Writing clean functions ensures that your code is readable, maintainable, and less prone to errors. Key tips include keeping functions small and well-named,... og:url: https://daily.dev/posts/clean-code-7-tips-to-write-clean-functions-yxi7yixdl og:image: https://api.daily.dev/og/posts/YXi7yiXDl.png og:image:alt: Clean Code: 7 tips to write clean functions og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Clean Code: 7 tips to write clean functions **[Substack](https://daily.dev/sources/substack)** · 5 min read · 1404 upvotes · 43 comments ## Summary Writing clean functions ensures that your code is readable, maintainable, and less prone to errors. Key tips include keeping functions small and well-named, limiting parameters, reducing nesting by returning early, writing pure functions without side effects, avoiding boolean flags, and using comments sparingly. Good coding is about communication between programmers, so clarity and simplicity are paramount. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Community discussion Top comments from developers on daily.dev. **@minhnh** · 22 upvotes > I would prefer unoptimized but readable code than optimized unreadable code, really. hardwares nowadays are so powerful that bubble sort runs just fine on million records. to all programmers out there: optimize for readability instead, please. **@je\_saura** · 6 upvotes > This is super basic, but in a good way. > > Make sure you apply ALL this principles. 🤗 **@otis\_98py** · 6 upvotes > Simple and practical **@andrewjotjz** · 3 upvotes > Great tips! **@abdullah75** · 3 upvotes > Not passing boolean as param. This was most helpful for me. Thanks! ## Similar posts on daily.dev - [Don’t just attend KubeCon \+ CloudNativeCon, Merge Forward your experience\!](https://daily.dev/posts/don-t-just-attend-kubecon-cloudnativecon-merge-forward-your-experience--l0rpp73x8) · CNCF · 1 upvotes · 0 comments - [Announcing H2 2026 KCDs](https://daily.dev/posts/announcing-h2-2026-kcds-m96goajm1) · CNCF · 1 upvotes · 0 comments - [Two months of Open Community Groups](https://daily.dev/posts/two-months-of-open-community-groups-asf52zhbs) · CNCF · 0 upvotes · 0 comments - [CNCF Unveils Schedule for KubeCon \+ CloudNativeCon Europe 2026](https://daily.dev/posts/cncf-unveils-schedule-for-kubecon-cloudnativecon-europe-2026-ikhcoa5cb) · CNCF · 2 upvotes · 0 comments - [CNCF Debuts KubeCon \+ CloudNativeCon Japan 2026 Schedule](https://daily.dev/posts/cncf-debuts-kubecon-cloudnativecon-japan-2026-schedule-xp5pyudub) · CNCF · 1 upvotes · 0 comments --- Tags: [#tdd](https://daily.dev/tags/tdd) [View this post on daily.dev](https://daily.dev/posts/clean-code-7-tips-to-write-clean-functions-yxi7yixdl) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Clean Code: 7 tips to write clean functions","url":"https://daily.dev/posts/clean-code-7-tips-to-write-clean-functions-yxi7yixdl","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/clean-code-7-tips-to-write-clean-functions-yxi7yixdl"},"datePublished":"2024-07-08T14:34:14.010Z","dateModified":"2024-08-23T15:56:50.220Z","description":"Writing clean functions ensures that your code is readable, maintainable, and less prone to errors. Key tips include keeping functions small and well-named,...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/26614a5217f509a9f899f1118eafbe58?_a=AQAEuiZ","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/26614a5217f509a9f899f1118eafbe58?_a=AQAEuiZ","isAccessibleForFree":true,"articleSection":"Substack","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Substack","logo":"https://media.daily.dev/image/upload/s--KFqxX_OL--/f_auto,t_logo/v1698154293/logos/substack.jpg","url":"https://daily.dev/sources/substack"},"commentCount":43,"discussionUrl":"https://daily.dev/posts/clean-code-7-tips-to-write-clean-functions-yxi7yixdl","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1404},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":43}],"keywords":"tdd","timeRequired":"PT5M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Substack","item":"https://daily.dev/sources/substack"},{"@type":"ListItem","position":3,"name":"Clean Code: 7 tips to write clean functions"}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/clean-code-7-tips-to-write-clean-functions-yxi7yixdl","comment":[{"@type":"Comment","text":"I would prefer unoptimized but readable code than optimized unreadable code, really. hardwares nowadays are so powerful that bubble sort runs just fine on million records. to all programmers out there: optimize for readability instead, please.","datePublished":"2024-07-11T04:32:29.023Z","url":"https://daily.dev/posts/YXi7yiXDl#c-lkRIcl82n","author":{"@type":"Person","name":"Minh Nguyen","url":"https://daily.dev/minhnh","image":"https://avatars.githubusercontent.com/u/6817741?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":22}},{"@type":"Comment","text":"This is super basic, but in a good way.\nMake sure you apply ALL this principles. 🤗","datePublished":"2024-07-11T07:30:37.281Z","url":"https://daily.dev/posts/YXi7yiXDl#c-dAY2B2DCH","author":{"@type":"Person","name":"eddsaura","url":"https://daily.dev/je_saura","image":"https://avatars0.githubusercontent.com/u/13334047?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":6}},{"@type":"Comment","text":"Simple and practical","datePublished":"2024-07-11T02:20:05.440Z","url":"https://daily.dev/posts/YXi7yiXDl#c-P7Z5nCzhu","author":{"@type":"Person","name":"Lê Minh Hiếu (Otis)","url":"https://daily.dev/otis_98py","image":"https://avatars.githubusercontent.com/u/69639199?v=4"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":6}},{"@type":"Comment","text":"Great tips!","datePublished":"2024-07-16T23:04:11.968Z","url":"https://daily.dev/posts/YXi7yiXDl#c-weyBcEx8u","author":{"@type":"Person","name":"Andrew Jot","url":"https://daily.dev/andrewjotjz","image":"https://lh3.googleusercontent.com/a/ACg8ocK6B2wUkDJGIQNCn1CBr051r9Ud4d5OzDTxvoNh4Ec1JtIA_Mc=s96-c"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3}},{"@type":"Comment","text":"Not passing boolean as param. This was most helpful for me. Thanks!","datePublished":"2024-07-29T04:33:37.371Z","url":"https://daily.dev/posts/YXi7yiXDl#c-CZidBbyRP","author":{"@type":"Person","name":"Abdullah","url":"https://daily.dev/abdullah75","image":"https://media.daily.dev/image/upload/s--O0TOmw4y--/f_auto/v1715772965/public/noProfile"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3}}]} ```