Skip to content
Toolssy logo Toolssy

Toolssy Guides

Clear, practical explainers about randomness and how to generate it, from first principles to code.

What Is a Random Number Generator? A clear, beginner-friendly explanation of what a random number generator is, how it works and where it's used. How Do Random Number Generators Work? From seeds and entropy to algorithms and the Web Crypto API, here's exactly how random number generators produce their results. True Random vs Pseudo-Random: What's the Difference? Understand the two kinds of randomness, how they differ, and which one you actually need for your task. How to Generate Random Numbers in Excel Use RAND, RANDBETWEEN and RANDARRAY to generate random numbers in Excel, with formulas, examples and tips. How to Generate Random Numbers in Python Generate random numbers in Python with the random and secrets modules, including ranges, integers, floats and secure values. How to Generate Random Numbers in Java Generate random numbers in Java with Math.random, java.util.Random, ThreadLocalRandom and SecureRandom, with code examples.