![]() To safely access a property of a nullable variable, you can use the safe call operator as follows: val length: Int? = text?.length If the variable is null, the expression returns null instead of throwing an NPE. ![]() It ensures that the expression is only evaluated if the variable is not null. The safe call operator is placed between the nullable variable and the property or method being accessed. It provides a concise and safe way to access properties and invoke methods on nullable variables, avoiding null pointer exceptions (NPEs). The safe call operator, denoted by ?., is a fundamental feature of Kotlin's null safety system. For more information, read our affiliate disclosure. If you click an affiliate link and subsequently make a purchase, we will earn a small commission at no additional cost to you (you pay nothing extra). Important disclosure: we're proud affiliates of some tools mentioned in this guide. To perform a null check in Kotlin, you can use the safe call operator ( ?.) and the not-null assertion operator ( !!). The null check in Kotlin refers to the process of verifying if a variable or an expression is null before accessing its properties or invoking methods on it. In Kotlin, null safety is a key feature designed to prevent null pointer exceptions (NPEs) at runtime. Keep laughing and enjoy your coding journey!□□ Why did the Kotlin developer bring a safety net to the circus?īecause they knew the performers would be throwing around null pointers!
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