Does Unity3D use C++?

Unity3D does not directly use C++ for scripting but does rely on C++ for its underlying engine architecture. Performance-wise, the Unity engine itself is written in C++, as this allows it to easily handle complex graphics rendering, physics calculations, and memory management. In Unity, game development and scripting are majorly done through the use of C#.
Though it is not used directly for scripting, a C++ knowledge could mean the developer interacts with C++ code either through Unity’s native plugins or through writing custom plugins in C++ to optimize performance or to integrate with lower-level system functions.