Hey I have come across an error in the IntelliJ IDE in Main kotlinlang #getting-started

Hey! I have come across an error in the IntelliJ IDE in Main.kt the tutorial i am following is telling me to declare my functions like so but i am getting issues with the compiler. the code:

fun sayHello(itemToGreet:String) = println("Hello $itemToGreet")

fun main() {
    sayHello(itemToGreet: "Kotlin")
    sayHello(itemToGreet: "World")

}

The error:

Landry Norris

07/07/2022, 7:27 PM

You need to write

itemToGreet = "Kotlin"

when calling sayHello

Same with the second call.

fun sayHello(itemToGreet: String) = println("Hello $itemToGreet")

fun main() {
    sayHello(itemToGreet = "Kotlin")
    sayHello(itemToGreet = "World")

}

The parameter name is also not required, unlike in Swift. You can just write

fun sayHello(itemToGreet:String) = println("Hello $itemToGreet")

fun main() {
    sayHello("Kotlin")
    sayHello("World")

}

👍 1

Will_505

07/07/2022, 7:33 PM

ah i see. ok interesting. I will try to perform that change when going through the video tutorials then. the video is from 2019 so maybe its outdated

Thank you!

Landry Norris

07/07/2022, 7:36 PM

Interesting. I don’t think Kotlin’s ever supported (name: value) syntax for parameters. You do use (name: Type) when defining the function and (name = value) syntax when calling with explicit parameter names.

Will_505

07/07/2022, 7:40 PM

it was the IDE adding in some fancy syntax and because of the font from the instructor i assumed they had typed it out. that's why. because im new i just got confused

Their syntax appears much larger and looks like its been typed out

*font, not syntax

Landry Norris

07/07/2022, 7:42 PM

I see. It makes sense that the inlay there could be confusing. I wonder if JetBrains has considered this. It could confuse a lot of people new to Kotlin.

Will_505

07/07/2022, 7:43 PM

I think the default font is very reasonable. but once custom themes come into play yea things could get confusing

Landry Norris

07/07/2022, 7:44 PM

That looks like it’s an IDE inlay. It’s not part of the actual code (there’s no text where it says ‘itemToGreet:’ in the file). It’s just a nice IDE feature that hints what the name is.

Will_505

07/07/2022, 7:44 PM

yea

Landry Norris

07/07/2022, 7:44 PM

You don’t need to type it in your file either. The IDE should show this itself.

Will_505

07/07/2022, 7:45 PM

Yea! i understand that now. thanks 👍

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