Relational operators establish a relationship between the values of the operands. They produce a Boolean (specified with the bool keyword in C++) true if the relationship is true, and false if the relationship is false. The relational operators are: less than (<), greater than (>), less than or equal to (<=), greater than or equal to (>=), equivalent (==), and not equivalent (!=). They may be used with all built-in data types in C and C++. They may be given special definitions for user-defined data types in C++ (you’ll learn about this in Chapter 12, which covers operator overloading).