Random Number Generator

What the random number generator does

This produces a random whole number, or several at once, between a minimum and a maximum you set. Choose your range, say how many you want, and press the button.

It is the digital version of drawing a number from a hat. Whenever you need an outcome that nobody can predict or steer, this hands you one on demand.

How to use it

1. Set the quantity. Choose how many numbers you want, with 1 as the default.
2. Set the minimum and maximum. These mark the range to draw from, with 1 and 100 as the defaults.
3. Press Generate. Your random number or numbers appear in the result area.

Press Reset to return to the defaults.

The range includes both ends

The minimum and maximum you set are both fair game, not just the numbers between them. So a range of 1 to 6 can return a 1 or a 6 as readily as anything in the middle, exactly like the faces of a die. This matters when your range stands for real choices, since you usually want the first and last options to have the same chance as the rest, and they do.

Every number is its own roll

When you ask for several numbers at once, each one is drawn on its own, with no memory of the others. That means the same number can come up more than once, just as rolling a die twice can land on the same face both times. If you generate five numbers from 1 to 10 and two of them match, nothing has gone wrong; independent draws are allowed to repeat. Each press is also a completely fresh set, unrelated to the last.

What it is good for

A random number settles all sorts of things. It can pick the winner of a raffle or giveaway by drawing a ticket number, stand in for dice or a spinner in a game, or make an unbiased choice when you cannot decide between options you have numbered. It is handy for picking a random item from a list by its position, for small simulations, and for any moment where you want chance, rather than preference, to choose.

How random it really is

The numbers come from the randomness built into your browser, which is what is called pseudo-random: produced by a formula clever enough that the output has no pattern you could spot or predict in normal use. For raffles, games, decisions, and everyday needs, that is more than random enough and perfectly fair. The one place to be careful is anything demanding true, tamper-proof unpredictability, such as security keys, passwords, or regulated gambling, which need a generator built for that purpose. For ordinary fun and fairness, this is exactly the right tool.

Questions people ask

How do I generate a random number?

Set a minimum and maximum to mark your range, choose how many numbers you want, and press Generate. Each result is a random whole number within that range.

Can it return the minimum or maximum itself?

Yes. Both ends of the range are included, so a range of 1 to 6 can return a 1 or a 6 just as easily as the numbers in between.

Can the same number come up twice?

Yes. When you generate several, each is drawn independently, so repeats can happen, the same way rolling a die twice can give the same face.

Is it random enough for security?

It is pseudo-random, which is fair and unpredictable for games, raffles, and everyday use, but not built for security keys, passwords, or regulated gambling, which need a generator designed for true unpredictability.

References

1. Random number generation. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org/wiki/Random_number_generation