reference manual: Conditional ternary operator

Development Libraries
1

I can not find the documentation for Conditional ternary operator (?):
where is it?

An example of use

Serial.println(  ( (true == 1) ? ("TRUE") : ("FALSE") ) ); // PRINT TRUE
Serial.println(  true == 0 ? "TRUE" : "FALSE" ); // PRINT FALSE
Serial.println(  true == 1 ? String(true) : ""  ); // PRINT 1
Serial.println(  false == 0 ? String(false): "" ); // PRINT 0
2

This is a standard C/C++ operator. If you search for 'C++ ternary operator' you will get more than you need.