Unreal Engine 3, which is written in the programming language?

[barisyildiz72]

Unreal Engine 3, which is written in the programming language?

[Graylord]

I can only assume you meant to ask what language it is written in?

UE3 uses C++, but the game programming (and UDK by extent) uses UnrealScript.

[Wormbo]

The engine itself is written in C++, but without one of those expensive licenses, that information isn't really of any use for you.

In the UDK (and generally any game based on Unreal Engine1, 2 or 3) you create your game logic using the UnrealScript language, a programming language similar to Java or C#.