Why this code doesn't work?

Question

When i do this lesson Sololearn shows an error But when i test this code in XCode playground, it works correctly

let siblings = 3
let popsicles = 9

if (popsicles % siblings) == 0 {
print("give away")
} else {
print("eat them yourself")
}

Answer 1

You should get the variables from inputs.

Answer 2

let siblings = Int(readLine(strippingNewline: true)!)!
let popsicles = Int(readLine(strippingNewline: true)!)!

if (popsicles % siblings == 0) {
print("give away")
} else {
print("eat them yourself")
}

Answer 3

please can you explain in more detail? I don't understand, why here it doesn't work