Educator

Operators & Expression

• Most operators work on two “parameters” and return a value
• Some operators work on just one
• One has three parameters
• Assignment operators designate “assigning” a value to a variable
• Arithmetic operators perform arithmetic on their parameters to return the arithmetic value
• Compound operators perform both arithmetic and assignment
• Increment /Decrement operators change their parameter by 1
• Comparison operators compare their parameters for equality, inequality, which is greater, etc. Their value is the “truth” of the comparison.
• Logical operators test the “truth” of their parameters
• Types can be “cast” into other types, sometimes with truncation
• Types can be “promoted” to larger types
• Operator precedence; operations are performed left to right, except certain operators are performed before others
• Expressions consist of Variables, constants, functions, and other expressions, connected with operators, to return a value
• Here is a link to a comprehensive list of C++ operators, include their precedence: http://www.cplusplus.com/doc/tutorial/operators/