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①. The online random number generator can randomly generate the numbers you set, which can be unique or repeated. It can be applied in Dota2 roll generators, Warcraft roll assistants, lotteries, or any application that requires random numbers.
②. There are many different methods to generate random numbers. These methods are called random number generators. The most important characteristic of random numbers is that the number generated afterwards has no relation to the previous number.
③. True random numbers are generated using physical phenomena: such as flipping coins, rolling dice, spinning wheels, using electronic component noise, nuclear fission, etc. Such random number generators are called physical random number generators, and their drawback is that they require relatively high technology.
④. In practical applications, pseudo-random numbers are often sufficient. These sequences are "apparently" random numbers, but in fact, they are generated through a fixed, repeatable calculation method. They are not truly random because they can actually be calculated, but they have statistical characteristics similar to random numbers. Such generators are called pseudo-random number generators.