Understand Ruby random numbers with easy examples. Learn how to use rand, ranges, and seeds to generate reliable random values.

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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.

Ruby Random Numbers: How to Generate Them With Examples