@Usage

public List<GameObject> list = new List<GameObject>();

int age = 10;
float speed = 12f;
bool flag = true;
string uname = "cnplaman";
List<string> list = new List<string>{ "hi", "gl" };

void Update()
{
      if (Input.GetMouseButtonDown(0))
      {
          Debug.Log("左键按下");
      }
      if (Input.GetMouseButtonDown(1))
      {
          Debug.Log("右键按下");
      }
      if (Input.GetMouseButtonDown(2))
      {
          Debug.Log("中键按下");
      }
}

void Update()
{
      if (Input.GetKeyDown(KeyCode.Escape))
      {
          print("Escape down");
      }
      if (Input.GetKeyDown(KeyCode.KeypadEnter))
      {
          print("Pad Enter down");
      }
      if (Input.GetKeyDown(KeyCode.Return))
      {
          print("Enter down");
      }

}

void Start()
{
  print("app start");
  Debug.Log("hi");
  Debug.LogWarning("hi");
  Debug.LogError("hi");
}