The difference between IOS Arc4random () and Arc4random_uniform ()

there is a arc4random () function in objective-c that generates random numbers and does not require seed, but this function generates a large range of random numbers, and it is a bit cumbersome to use a modulo algorithm to limit random values. in fact, Objective-c has a more convenient random number function arc4random_uniform (x), which can be used to generate random numbers in the range of 0~ (x-1), without the need for modulo operations. If you want to generate a random number of 1~x, you can write this:arc4random_uniform (x) +1.

The difference between IOS Arc4random () and Arc4random_uniform ()