Coding an RNG (Random Number Generator)

An RNG or Random Number Generator is a computer program that determines the outcome of a sequence. It uses an algorithm—a sort of mathematical function—or a physical attribute to ensure the results are 100% random.

Types Of Random Number Generators

An RNG is either a Hardware Random Number Generator that generates its numbers as a function of the current changing value and is impossible to predict. Or a Pseudo-Random Number Generator that produces results that look random but come from a seed sequence.

1. Hardware Random Number Generators (HRNGs)

HRNGs measure random physical phenomena and then compensate for any possible biases within a system. Example sources of input in these RNGs include electromagnetic waves, radioactive decay, and atmospheric and thermal noise.

2. Pseudo-Random Number Generators (PRNGs)

PRNGs produce seemingly random results using computer algorithms. It determines these results from a shorter initial value, known as a seed value or key. As a result, some other programs can reproduce this random sequence if they know the initial value.

How Does Computational RNG work?

Most computer-generated RNGs have two parts; the seed sequence and the random number it chooses from the series. By seeding the program, you give it somewhat of a starting point that contains several numbers.

Computers execute codes based on a set of rules, and RNGs are not an exception. A general example algorithm for Pseudo-Random Number Generators revolves around:

  1. Accept The initial command you input in the machine, that is, a seed or key. It can be a number, letter, or symbol.
  2. Apply: When the RNG computes the input, it uses a sequence of mathematical operations to generate a result. The result is the subsequent random output based on your input type.
  3. Use: Once it gives you a result for your initial input, an RNG uses that random output for the next iteration.
  4. Repeat: The machine continues to produce results and emulate the randomness until the program stops.

Periods are the number of iterations that an RNG goes through before it can start the process again. So, if all things remain constant, a random computer program with more extended periods would require more computer resources to crack.

Creating A Random Number Generator

The codes in RNGs fetch data from an Application Programming Interface, courtesy of pages like These online resources also come with many customizable and valuable tools to go with your base program.

1. Setting Parameters

The parameters RNGs can take allow different users to customize the output based on their preference. For instance, ‘max’ and ‘min’ variables enable you to set upper and lower limits on the result you want to generate.

2. Generate Buttons

An RNG will only invoke a string of relatively random results when users click the generate function. The button also handles any errors that could occur in the output. You can set it with base variables, determining if the result you get is binary, decimal, or hexadecimal.

3. Appearance

Computerized Random Number Generators mostly use JavaScript or HTML codes to deal with structure. In some programs, you can easily modify its style as per your requirements. However, most are fixed, and you’d require to hack the systems to change their functions.

What RNGs Mean For Casino Players

One of the essential aspects of online casinos is that their games are fair. And to have this honesty, they have to be random. An RNG aims to produce a unique sequence of results every time you run the program by playing a game.

In slots, the software generates random symbols across multiple paylines. It only provides certain combinations of results to achieve a consistent RTP, ultimately deciding whether players win or lose. All this implies is that the casino or player cannot alter slots in their favor, so neither party can predict which symbol will come up.

For players to differentiate a safe casino from a rigged online casino, an RNG is what you should look for first. That’s why game developers spend a lot of time and effort ensuring their games use the best RNG technology.


Bottom line, companies design RNG solutions to predict numbers or variables without bias. In online casinos, it ensures equal chances for all involved players. So, only play with the sites that host RNG audited and certified games as they are safe and fair.

Author Bio

Hi! I’m Bryan, and I’m a passionate & expert writer with more than five years of experience. I have written about various topics such as product descriptions, travel, cryptocurrencies, and online gaming in my writing journey. The latter is one of my favorites topics, and you can find some of my premium casino content at OUSC. 

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