Visual C# 2005 Guide
Relational operators are used in Boolean expressions (expressions which evaluate to either true or false) when we want to test things in our programs.
|Not equal to||!=|
|Less than or equal to||<=|
|Greater than or equal to||>=|
In addition to the relational operators, the boolean operators, NOT, AND, OR can also be used in boolean expressions.
|! (Number < 30)||Number is not less than 30|
|(Number > 5) && (Number < 30)||Number is greater than 5 and less than 30|
|(Number < 5) || (Number > 30)||Number is less than 5 or Number is greater than 30|