there are many different ways to generate random numbers. these methods are called random number generators. the most important characteristic of a random number is that when it is generated, the subsequent number has nothing to do with the previous number. random number

true random numbers are generated using physical phenomena: such as coin toss, dice, spinning wheels, noise using electronic components, nuclear fission, etc. such random number generators are called physical random number generators. their disadvantage is that their technical requirements are relatively high.

in practical applications, pseudo-random numbers are often sufficient. these sequences are "seemingly" random numbers, but in fact they are generated by a fixed, repeatable calculation method. they are not truly random since they can actually be calculated, but they have statistical characteristics similar to random numbers. such a generator is called a pseudo-random number generator.