# libtmux::Window::index

- **Module:** libtmux::Window
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/85e8bd603a322dc32bb8b9aeb1a72bcf36945f1d/include/libtmux/entities.hpp#L423
- **Page:** https://libtmux.org/reference/cxx/libtmux-window-index-1i4m/

```
libtmux::Window::index() -> long long
```

Position within its session, which `base-index` is free to start anywhere.