srand time null
In the C programming language, srand(time(NULL))
is used to seed the random number generator with the current time. This ensures that each time the program is run, a different sequence of random numbers is generated. The srand
function takes an argument of type unsigned int
, which is typically the return value of the time
function with a NULL
argument. By passing NULL
to the time
function, it retrieves the current time from the system clock. The srand
function then uses this value as the seed for the random number generator.
Please note that the srand(time(NULL))
function is commonly used in C programs to generate random numbers, but it is important to be aware of its limitations. The random number generator in C is not truly random and its sequence can be predicted if the seed value is known. Additionally, the time
function has a limited resolution, which means that if the program is run multiple times within a short period, it may produce the same seed value and therefore the same sequence of random numbers. To mitigate these limitations, more advanced random number generation techniques can be used