You can use it in combination with the Elvis operator. Note that if the variable is a mutable property, you won't be able to smart cast it to its non-nullable type inside the if statement (because the value might have been modified by another thread) and you'd have to use the safe call operator with let instead. Therefore when comparing to null, the structural equality a = null is translated to a referential equality a = null.Īccording to the docs, there is no point in optimizing your code, so you can use a = null and a != null

Previously, we covered the basics of MSAL and an introduction to MS Graph for Android, so be sure to check out those posts. Solution 2Ī structural equality a = b is translated to a?.equals(b) ?: (b = null) This week, we’ll be continuing our blog series on using the Microsoft Authentication Library (MSAL) and the Microsoft Graph to connect to M365 services in your own Android apps. Let’s check it out Using the Safe-Call Operator to Invoke Functions and Properties. Both approaches generate the same bytecode so you can choose whatever you prefer. Use Conditional Statements to Implement a Null Check in Kotlin The easiest way to check null in Kotlin is by using conditional statements. There’s one more null-safety tool that Kotlin gives us.

Null check in kotlin