How do I find the function definition?

Hello- Where I can I see the complete function that comes with an example. The one I want to see in analog_write() Thank you, Nora

%arduino_install_path%/hardware/cores/arduino/wiring_analog.c

For me it is:
C:\programming\arduino-0015\hardware\cores\arduino\wiring_analog.c

line 77

Thank you- I am using Linux. Do you have any idea how I can navigate there? Nora

I found it.

How does the example file know to link to that function without a defined library? Or is it implied....?

It is impled.

It is automatically included by the Arduino preprocessor. [as are all the files in the core folder]