Question Mark Kotlin. What does question mark mean in Kotlin? For Kotlin types it means that null value is allowed to be represented by this type In practice it means that the type was declared with a question mark at the end.
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In Kotlin the type system distinguishes between references that can hold null (nullable references) and those that can not (nonnull references).
Safe calls(?.) vs Null checks(!!) in Kotlin · Suneet Agrawal
Kotlin treats null as something more than the source of nullpointer exceptions In your code snippet somevariablevalue is of a “nullable type” such as MutableList? or Axolotl? A MutableList cannot be null but a MutableList? might be null .
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What does question mark mean in Kotlin? AskingLot.com
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The questionmark in JavaScript is commonly used as conditional operator — called ternary operator when used with a colon () and a questionmark (?) — to assign a variable name conditionally What is Lateinit in Kotlin?.
