Chapter Glossary call: To use a method. concatenation operator: Joins data values and String literals into one message for output repre- sented by the plus sign (+). constant: Value that cannot change during the execution of the program. data type: Format in which the data will be stored and the size the variable will be given in memory. exception: Error detected by a method from which it cannot recover. hard-coding: Defining a variable value in the code. identifier: Name the programmer chooses for a variable in the program also used as names for programs and for any methods the program defines. literal value: Textual representation of a value. primitive data type: One of eight data types built into Java. prompt: Message displayed to the user indicat- ing what to input or what action to take. real number: Number with a fractional part. String literal: Sequence of characters enclosed in quotation marks. variable: Named memory location containing data that can change from one execution of the program to another. Copyright Goodheart-Willcox Co., Inc. 73