Section 3.15 Vocabulary
- variable:
- A named storage location for values. All variables have a type, which is declared when the variable is created.
- value:
- A number or other data that can be stored in a variable. Every value belongs to a type (e.g.,
intorstring). - literal value:
- A value that is written directly in the code.
- type:
- Mathematically speaking, a set of values. The type of a variable determines which values it can have.
- declaration:
- A statement that creates a new variable and specifies its type.
- keyword:
- A reserved word used by the compiler to analyze programs. You cannot use keywords (like
intandvoid) as variable names. - assignment:
- A statement that gives a value to a variable.
- initialize:
- To assign a variable for the first time.
- state:
- The variables in a program and their current values.
- memory diagram:
- A graphical representation of the state of a program at a point in time.
- operator:
- A symbol that represents a computation like addition, multiplication, or string concatenation.
- operand:
- One of the values on which an operator operates. Most operators in C++ require two operands.
- expression:
- A combination of variables, operators, and values that represents a single value. Expressions also have types, as determined by their operators and operands.
- order of operations:
- The rules that determine in what order expressions are evaluated. Also known as “operator precedence”.
- modulo:
- An operation that yields the remainder when one integer is divided by another. In C++, it is denoted with a percent sign:
5 % 2is1. - modulus:
- The value of
bin the expressiona % b. It often represents unit conversions, such as 24 hours in a day, 60 minutes in an hour, etc. - prompt:
- A brief message displayed in a print statement that asks the user for input.
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