You will Need Mac, the latest Xcode to complete this tutorial.

Open Xcode and create a new playground titled “How to generate Radom Numbers”

Create two variables to represent the limits.

var minNumber = 0
var maxNumber = 300

Now let’s use the random() function to generate a random number between 0 and 300.

var randomNumberValue = Int.random(in: minNumber...maxNumber)

Run and see the results, now you know how to generate Random number in Swift.

We can improve our code a little bit to show values between 1 and 1000 printed in a console:

for _ in 1...1000 {
    print(Int.random(in: 1...1000))
}

Run and see the results:

If you have the array of Ints and want to get a random value out of it, you can do it with the shuffle() or shuffled() . Type these lines and Run.

var array = [18,323,34,22,9078,65]

print("array after shuffled(): \(array.shuffled())")

array.shuffle() // shuffle in place

print("array after shuffle(): \(array)")

BTW, we can use random() not only for Ints.

We can use it for Bool, Floats and Doubles too.

Just test bool randomness with these lines:

let boolRandomized = Bool.random()
print(boolRandomized)

for _ in 1...20 {
    print(Bool.random())
}

Check floats and doubles too:

for _ in 1...20 {
  
    let floatRandom = Float.random(in: 0..<79)
    print(floatRandom)

}



for _ in 1...20 {
   
    let doubleRandom = Double.random(in: 0.3...138.90)
    print(doubleRandom)

}

In this tutorial you’ve learned how to Generate Random numbers in Swift.

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