Learning C# 3.0

Summary

• An operator is a symbol that causes C# to take an action.

• The assignment operator (=) assigns a value to an object or variable.

• C# includes four simple arithmetic operators, +, -, *, and /, and numerous variations such as +=, which increments a variable on the left side of the operator by the value on the right side.

• When you divide integers, C# discards any fractional remainder.

• The modulus operator (%) returns just the remainder from integer division.

• C# includes numerous special operators, such as the self-increment (++) and self-decrement (--) operators.

• To increment a value before assigning it, you use the prefix operator (++x); to increment the value after assigning it, use the postfix operator (x++). The same rule applies to the decrement operator.

• The relational operators compare two values and return a Boolean. These operators are often used in conditional statements.

• The conditional operator ( ? : ) is the only ternary operator found in C#. The test condition is found to the left of the question mark; it invokes the expression to the left of the colon if the tested condition evaluates true and the expression to the right of the colon if the tested condition evaluates false.

• The compiler evaluates operators according to a series of precedence rules, and parentheses have the “highest” precedence.

• It is good programming practice to use parentheses to make your order of precedence explicit if there may be any ambiguity.

You saw a lot of math in this chapter, which is certainly ...