```if foo = null do something foo now non null else otherStu kotlinlang #announcements

```if (foo != null) { // do something, foo now no...

gildor

03/06/2018, 7:38 AM

Copy code

if (foo != null) {
 // do something, foo now non-null
} else {
  otherStuff()
}

Kotlin compiler understands such pattern and allows you to use foo as non-null after check (if foo is immutable)