Random number between two decimals in Swift

Question

I'd like to get a random number between two small decimal numbers.

Between maybe 0.8 and 1.3.

var duration = CGFloat(arc4random() % 0.8) / 1.3

or

var duration = CGFloat(arc4random() % 0.5) + 0.8

Thanks!

Answer 1

Swift 5:

Using random(in:) which returns a random value within the specified range:

var duration = CGFloat.random(in: 0.8 ... 1.3)

Per Apple:

The random() static method chooses a random value from a continuous uniform distribution in range, and then converts that value to the nearest representable value in this type.

See random(in: using: ) to specify a random generator other than the default.