Built in functions

Question

We define a function by coding it; but do built in functions also have a definition in code? I wanna know so i can understand functions completely

Answer 1

Shahin Kh ,
each function, method, class, ... is build from code.
> unlike self-written functions, we cannot necessarily see built-in functions in the source code.

Answer 2

Lothar thanks

Answer 3

Also, many, if not all, Python builtin functions are written in Python itself, so you can read them in your operating system libraries directories

Answer 4

Emerson Prado Python built-in functions are written in C. They are then complied into the python interpreter. But there are equivalents in python's standard library, which are written in Python.

Answer 5

Interesting to read the distinction.
For the curious, the official Python code repositories:
https://github.com/python