You’re going to need to learn about the (relatively trivial) language conventions and boilerplatey stuff to get comfortable in straight C/C++, and then you can dig in to the Arduino source.

I’m learning C and finding it very different (strings are fixed size arrays etc.) ... For these reasons I stick with C on Arduino. I only use C++ when I access libs written by others in C++.

First, your Arduino sketch is converted to a suitable C++ file (with the .cpp extension), which then is compiled, linked and finally converted to the hex file that is uploaded to the Arduino board.

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You'll learn to tinker with Arduino boards and Raspberry Pi and get acquainted with programming languages like Python and C++. Expect hands-on lessons where you can apply your newfound skills ASAP ...

For AVR MCU, Framework and learning, build assembler subroutine, call from C++, Arduino IDE is C++. Arduino IDE 1.8.12 skectch is named *.ino, considered C or C++ of programming source code, under ...