Created Ternary operator file under Control Structure

[animeshsrivastava24]

Created a File for Ternary Operator under Control Structure
Ref: #519

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[per1234]

Suggested change

	`expression`. An expression is any legal combination of symbols that represents a value.
	`expression`: An expression is any legal combination of symbols that represents a value.

Use standard format for parameter documentation:

reference-en/AsciiDoc_sample/Reference_Terms/AsciiDoc_Template-Single_Entity.adoc

Line 43 in ac98490

`pin`: the number of the pin to write to. Allowed data types: int.

[per1234]

Suggested change

	int x = 10, y = 20, z; // declared and defined three variables x, y and z
	z = (x < y) ? x : y;
	int x = 10;
	int y = 20;
	int z = (x < y) ? x : y;

Beginners are likely to be unfamiliar with the ability to declare multiple variables in one statement. This is not documented in the Arduino Language Reference and they won't understand that the language contains all the capabilities of C++ and that the missing documentation for those capabilities can be found in any C++ reference, since this fact is not documented (#623).

In this case, using a separate statement for each declaration is actually just as good because the function of the code is now so clear that an explanatory comment is unnecessary.

[per1234]

Suggested change

	The statement checks the conditional expression and assigns `z` the value of `x`, the expression `x<y` is `true`.

I think this location is more appropriate for the description, rather than the previous location as a comment at the end of the code block.

[per1234]

Suggested change

// the statement checks the conditional expression and assigns z the value of x, the expression x<y is true

This accompanies my suggestion above to move the description out of the code block.