RandomZone Guide
Random Number Generator Guide: Ranges, Repeats and Use Cases
A random number generator is simple to use, but the right settings depend on whether you need one value, a batch of values, or a set without repetitions.
Choose the range
The minimum and maximum values define the set from which results can be selected. A range from 1 to 100 contains 100 integer values. Narrow ranges are useful for small drawings; larger ranges work better when many unique results are needed.
Repeats versus no repeats
With repeats allowed, every draw is independent and the same number may appear again. Without repeats, each selected number is removed from the available set for that batch. You cannot request more unique values than the range contains.
Useful applications
Common examples include games, classroom exercises, drawings, sample data, test cases and quick numeric choices. A general-purpose generator should not automatically be treated as a replacement for a specialized cryptographic key, token or regulated lottery system.
Browser-based randomness
RandomZone uses browser-based random mechanisms for its tools and Web Crypto where implemented. For security-sensitive tasks such as password generation, the security properties of the random source matter much more than they do for a classroom number draw.