Added an example and Notes and warnings

[ashpande]

Code was tested on Arduino Mega 2560.

[CLAassistant]

All committers have signed the CLA.

[per1234]

You added the content inside the "see_also" block instead of creating a new "howtouse" block. This resulted in an invalid Asciidoc document which would break the website generator.

Please move the content out of the "see_also" block, following the reference sample here:

https://github.com/arduino/reference-en/blob/master/AsciiDoc_sample/Reference_Terms/AsciiDoc_Template-Single_Entity.adoc?plain=1

[per1234]

Suggested change

	Prints the output of `bit(n)` for n=0 to n=10 to the serial monitor. Values returned are 1 2 4 8 16 till 1024.
	Prints the output of `bit(n)` for n=0 to n=10 to the Serial Monitor. Values returned are 1 2 4 8 16 till 1024.

Use correct capitalization for Arduino's "Serial Monitor" tool

[per1234]

Suggested change

	Serial.begin(9600);
	Serial.begin(9600);

Correctly format code

[per1234]

Suggested change

	}
	while (!Serial) {
	; // wait for serial port to connect. Needed for native USB port only
	}
	}

This will ensure those using a board like the Leonardo will see all the sketch output from n=0.

[per1234]

Suggested change

	for(int n=0;n<=10;n++) //loop from n=0 till 10
	{
	Serial.print(" "); //space between numbers, for readability
	Serial.print(bit(n)); //print the value of bit(n)
	delay(1000);
	//loop from n=0 till 10
	for (int n = 0; n <= 10; n++) {
	Serial.print(" "); //space between numbers, for readability
	Serial.print(bit(n)); //print the value of bit(n)
	delay(1000);

Use the standard Arduino code formatting style, as implemented by the default configuration of the Arduino IDE "Auto Format" feature.

[per1234]

It seems better to specify the parameter type in the "Parameters" section of the reference page.

I'm not sure what the best approach is for defining types of parameters of macros such as bit:

https://github.com/arduino/ArduinoCore-API/blob/1.3.1/api/Common.h#L71