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Update unified-types.md #861

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Expand Up @@ -24,7 +24,7 @@ In Scala, all values have a type, including numerical values and functions. The

`AnyVal` represents value types. There are nine predefined value types and they are non-nullable: `Double`, `Float`, `Long`, `Int`, `Short`, `Byte`, `Char`, `Unit`, and `Boolean`. `Unit` is a value type which carries no meaningful information. There is exactly one instance of `Unit` which can be declared literally like so: `()`. All functions must return something so sometimes `Unit` is a useful return type.

`AnyRef` represents reference types. All non-value types are defined as reference types. Anywhere an `AnyRef` Every user-defined type in Scala is a subtype of `AnyRef`. If Scala is used in the context of a Java runtime environment, `AnyRef` corresponds to `java.lang.Object`.
`AnyRef` represents reference types. All non-value types are defined as reference types. Every user-defined type in Scala is a subtype of `AnyRef`. If Scala is used in the context of a Java runtime environment, `AnyRef` corresponds to `java.lang.Object`.

Here is an example that demonstrates that strings, integers, characters, boolean values, and functions are all objects just like every other object:

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