Added example code/Notes and warnings

[ashpande]

Code was tested on Arduino Mega 2560

[per1234]

Suggested change

	void setup()
	{
	void setup() {

Arduino's standard code style uses attached braces.

[per1234]

Suggested change

	Serial.begin(9600);
	Serial.begin(9600);
	while (!Serial) {
	; // wait for serial port to connect. Needed for native USB port only
	}

This will make the example more friendly to users of the native USB boards (e.g., Leonardo).

[per1234]

Suggested change

	}
	void loop()
	{

Let's put this in setup() so it only runs once.

[per1234]

Suggested change

	int x = 6; int n = 1; //setting the value of x and n
	int x = 6;
	int n = 1;

This is more beginner friendly.

[per1234]

Suggested change

	Serial.print(bitRead(x,n)); //reading the bit at position n and printing the value
	Serial.print(bitRead(x, n)); //read the bit at position n and print the value

• Arduino style code formatting.
• Improve comment wording.

[per1234]

Suggested change

	}
	}
	void loop() {
	}

Necessary due to moving the code into setup().

[per1234]

Suggested change

Both `x` and `n` must be integer type.

I think this information would be better in the Parameters section, using the sample reference page as a model:
https://github.com/arduino/reference-en/blob/master/AsciiDoc_sample/Reference_Terms/AsciiDoc_Template-Single_Entity.adoc#parameters

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