what is ? for in this statement val x: String? = “...

# announcements

[qasim majeed]

what is ? for in this statement
val x: String? = “foo”

[gildor]

Nullable type, please check documentation
https://kotlinlang.org/docs/reference/null-safety.html#nullable-types-and-non-null-types

[gildor]

also, #getting-started is good channel for such questions