--- title: Ruby Random Numbers: How to Generate Them With Examples description: Ruby provides multiple approaches for generating random numbers: the simple `rand` method for basic randomness, the `Random` class for reproducible sequences... canonical: https://daily.dev/posts/ruby-random-numbers-how-to-generate-them-with-examples-flyostzyh twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Ruby Random Numbers: How to Generate Them With Examples | daily.dev og:description: Ruby provides multiple approaches for generating random numbers: the simple `rand` method for basic randomness, the `Random` class for reproducible sequences... og:url: https://daily.dev/posts/ruby-random-numbers-how-to-generate-them-with-examples-flyostzyh og:image: https://api.daily.dev/og/posts/fLYOStZyH.png og:image:alt: Ruby Random Numbers: How to Generate Them With Examples 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. # Ruby Random Numbers: How to Generate Them With Examples **[RUBYLAND](https://daily.dev/sources/rubyla)** · 5 min read · 0 upvotes · 0 comments ## Summary Ruby provides multiple approaches for generating random numbers: the simple `rand` method for basic randomness, the `Random` class for reproducible sequences using seeds, and the `SecureRandom` module for cryptographically secure values. The guide covers generating random integers, floats, and ranges, shuffling arrays, sampling elements, and practical applications like token generation, A/B testing, and database record selection. Key distinctions include when to use each method—`rand` for general purposes, seeded `Random` for testing reproducibility, and `SecureRandom` for security-sensitive operations like authentication tokens and API keys. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [The little Random that could](https://daily.dev/posts/the-little-random-that-could-a4hxu0o5m) · RUBYLAND · 0 upvotes · 0 comments - [Selecting random values in Python](https://daily.dev/posts/selecting-random-values-in-python-n1k4qsk7m) · Planet Python · 0 upvotes · 0 comments - [Ruby Numeric Deep Dive: Useful Methods You Probably Underuse \(With Examples\)](https://daily.dev/posts/ruby-numeric-deep-dive-useful-methods-you-probably-underuse-with-examples--unw6ptcjv) · Ruby Flow · 0 upvotes · 0 comments - [How to Implement Randomization with the Python Random Module](https://daily.dev/posts/how-to-implement-randomization-with-the-python-random-module-b9uussinr) · Towards Data Science · 0 upvotes · 0 comments --- Tags: [#testing](https://daily.dev/tags/testing), [#ruby](https://daily.dev/tags/ruby), [#rails](https://daily.dev/tags/rails) [View this post on daily.dev](https://daily.dev/posts/ruby-random-numbers-how-to-generate-them-with-examples-flyostzyh) ```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":"Ruby Random Numbers: How to Generate Them With Examples","url":"https://daily.dev/posts/ruby-random-numbers-how-to-generate-them-with-examples-flyostzyh","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/ruby-random-numbers-how-to-generate-them-with-examples-flyostzyh"},"datePublished":"2026-01-30T06:31:15.826Z","dateModified":"2026-01-30T06:31:41.258Z","description":"Ruby provides multiple approaches for generating random numbers: the simple `rand` method for basic randomness, the `Random` class for reproducible sequences...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e49cf85b52cad5c00077f6567f358eba?_a=AQAEulh","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e49cf85b52cad5c00077f6567f358eba?_a=AQAEulh","isAccessibleForFree":true,"articleSection":"RUBYLAND","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":"RUBYLAND","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/rubyla","url":"https://daily.dev/sources/rubyla"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/ruby-random-numbers-how-to-generate-them-with-examples-flyostzyh","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"testing,ruby,rails","timeRequired":"PT5M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"RUBYLAND","item":"https://daily.dev/sources/rubyla"},{"@type":"ListItem","position":3,"name":"Ruby Random Numbers: How to Generate Them With Examples"}]} ```