Chapter 2 Key Terms

Question 1

Data Type

Answer 1

a classification that describes what values can be assigned, how the item is stored, and what types of operations can be performed with the item.

Question 2

Numeric

Answer 2

describes data that consists of numbers and can be used in arithmetic operations.

Question 3

String

Answer 3

describes data that is nonnumeric.

Question 4

Integer

Answer 4

A whole number.

Question 5

A Floating Point

Answer 5

number is a number with decimal places.

Question 6

Real Numbers

Answer 6

floating-point numbers

Question 7

Numeric Constant (or literal Numeric Constant)

Answer 7

is a specific numeric value.

Question 8

String constant (or literal string constant)

Answer 8

is a specific group of characters enclosed within quotation marks.

Question 9

Alphanumeric values

Answer 9

can contain alphabetic characters, numbers, and punctuation.

Question 10

Unnamed constant

Answer 10

is a literal numeric or string value.

Question 11

Declaration

Answer 11

is a statement that provides a data type, an identifier, and, optionally, an initial value.

Question 12

Numeric variable

Answer 12

is one that can hold digits, have mathematical operations performed on it, and usually can hold a decimal point and a sign indicating positive or negative.

Question 13

String variable

Answer 13

can hold text that includes letters, digits, and special characters such as punctuation marks.

Question 14

Type-safety

Answer 14

is the feature of some programming languages that prevents assigning values of an incorrect data type.

Question 15

Identifier

Answer 15

a program component’s name.