# libtmux::Window::index

- **Module:** libtmux::Window
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/393d4b0ad666f18a6581f1eb281741a75a7503f0/include/libtmux/entities.hpp#L512
- **Page:** https://libtmux.org/en/cxx/latest/reference/libtmux-window-index-1i4m/

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

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