iOS development-Generate random numbers

Sometimes we need to generate random numbers in the program, but there is no corresponding function in objective-c, fortunately rand (),srand (),random (),arc4random () are provided in C Several functions. So how do you use it? Here's a quick introduction:

1. Get a random integer range in:[0,100] including 0, excluding

int x = arc4random ()%;

2. Get a random number range in:[500,1000], including 500, including

int y = (arc4random ()% 501) + x;

3. Get a random integer range in [From,to], including from , including to

-(int) GetRandomNumber: (int) from to: (int.) to

{

return (int) (from + (Arc4random ()% (To–from + 1));

}

iOS development-Generate random numbers