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iOS Swift Basics (retired) Types Numbers

Posted by Andrew Cota
Andrew Cota
747 Points

it keeps saying that my " 'let' declarations require an initializer expression" does anybody know what this means?

Please read above

numbers.swift 
let title: String
  println("A Dance with Dragons")
Andrew Cota
Andrew Cota
747 Points

thank you so very much!

Andrew Cota
Andrew Cota
747 Points

thank you so very much!

Andrew Cota
Andrew Cota
747 Points

thank you so very much!

Andrew Cota
Andrew Cota
747 Points

thank you so very much!

3 Answers

agreatdaytocode
agreatdaytocode
24,757 Points 
let title: String
title = "A Dance with Dragons"
println(title)
Robin Nilsson
Robin Nilsson
3,783 Points
Robin Nilsson
Robin Nilsson
3,783 Points

Or rather:

let title: String = "A Dance with Dragons"
println(title)
agreatdaytocode
agreatdaytocode
24,757 Points

That will work too. :)

kjvswift93
kjvswift93
13,515 Points
kjvswift93
kjvswift93
13,515 Points

Since you declared 'title' as a constant, meaning a value fixed in memory, it must be given a value, else the concept of a constant declaration has no meaning. The error is basically Swift saying, "Why did you tell me to store a constant value in my memory without telling me what it is?"

Andrew Cota
Andrew Cota
747 Points

thank you so very much

boruch woolstone
boruch woolstone
1,192 Points
boruch woolstone
boruch woolstone
1,192 Points

what you have done above is declared a constant (using the "let" keyword) given it a name (title) and said that it is of the type String but you have not given it any value. if you wrote let title: String = "A String" then the compiler would not show that error message and the value of title would be A string

Andrew Cota
Andrew Cota
747 Points

I appreciate your support on this question!