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Sameer Vohra
754 PointsIf let necessary?
Is this right? Seems like it works, but I didn't use the "if let" portion. Do I need to, why?
func isDivisble (#number1: Int, #number2: Int) -> Bool? {
if number1 % number2 == 0 {
println("Divisible")
} else if number1 % number2 != 0 {
println("Not Divisible")
}
return nil
}
isDivisble(number1: 15, number2:5)
2 Answers
Carsten Sinke
3,506 PointsThe keyword “let” is used to define a constant. This is told in one of the first iOS courses. Since you’ve already defined your variables you don’t need to use the “let” keyword (or the “var” keyword for that matter)
Dennis Parussini
Treehouse Project ReviewerYes, you have to add the 'if let' before calling the function. In the playground this works without 'if let' but in a real world project this wouldn't do anything.
So in your case it would look something like this
func isDivisble (#number1: Int, #number2: Int) -> Bool? {
if number1 % number2 == 0 {
println("Divisible")
} else if number1 % number2 != 0 {
println("Not Divisible")
}
return nil
}
if let result = isDivisble(number1: 15, number2:5){
//do something like println(result)
}