How the numbers are picked
Numbers come from your browser's cryptographically secure random number generator (crypto.getRandomValues), the same source used for encryption keys, not the predictable Math.random(). A technique called rejection sampling makes sure every number in the range is exactly equally likely, with no bias toward low or high values.
Both the minimum and the maximum are included. With No repeats on, each number can appear only once, like drawing raffle tickets from a hat.
Ideas
- Raffles and giveaways: number the entries and draw winners with no repeats.
- Dice: set 1 to 6 (or 1 to 20 for a d20).
- Lottery-style picks: e.g. 5 numbers from 1 to 69 with no repeats, sorted.
- Classroom: pick a random student number or group order.
Frequently asked questions
Is this truly random?
It uses your device's cryptographic random generator, which is seeded from hardware and system entropy and is designed to be unpredictable. It's suitable for games, drawings and sampling.
Can I generate negative numbers?
Yes. Any whole numbers work, for example −50 to 50.
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