Debug console prints the same random number for each loop iteration

Question

I've written a simple code which appends a random number inside a loop.

var randomNumber = Int.random(in: 0...3)

var array = [Int]()

for _ in 1...4 {
    array.append(randomNumber)
}

print(array)

Instead of appending different numbers for each loop iteration I receive the same ones.

Debug console:

[0,0,0,0]

How can I print a different number for each loop iteration?

score 1 · Answer 1 · answered Oct 25 '20 at 08:15

1

maybe you should create the random number insude the loop as follow:

var array = [Int]()

for _ in 1...4 {
    array.append(Int.random(in: 0...3))
}

print(array)

answered Oct 25 '20 at 08:15

oded bartov

score 1 · Accepted Answer · answered Oct 25 '20 at 08:20

This is caused because the random number is created outside of the for loop and won't change because it is created only once.

Instead create the random number inside your for loop

var array = [Int]()

for _ in 1...4 {
    let randomNumber = Int.random(0...3)
    array.append(randomNumber)
}

print(array)

2 Answers2