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CIT166 VB Ch 3
VB Prog Ch 3 Variables, Constants, and Calculations
| Term | Definition |
|---|---|
| Arguments | items within parentheses after the name of either a method or a procedure; represents information that the method or procedure needs to perform its task(s) |
| Class scope | the scope of a class-level memory location (variable or named constant); refers to the fact that the memory location can be used by any procedure in the form class’s declarations section |
| Class-level named constants | a named constant declared in a form class’s declarations section; it has class scope and should be declared using the keywords Private Const |
| Class-level variables | a variable declared in a form class’s declarations section; it has class scope and should be declared using the keyword Private |
| Const statement | the statement used to create a named constant |
| Declaring a memory location | reserving a location in the computer’s main memory for use within an application’s code |
| Demoted | the process of converting a value from one data type to another data type that can store only smaller numbers or numbers with less precision |
| Dim statement | the statement used to declare procedure-level variables Enter event |
| Flowchart | a planning tool that uses standardized symbols to illustrate the steps a procedure must take to accomplish its purpose |
| Flowlines | the lines connecting the symbols in a flowchart |
| Form class’s declarations section | the area located between the Public Class and End Class clauses in the Code Editor window; class-level memory locations are declared in this section |
| Format | specifying the number of decimal places and the special characters to display in a number treated as a string |
| Implicit type conversion | the process by which a value is automatically converted to fit the data type of the memory location to which it is assigned |
| Input/output symbol | the parallelogram in a flowchart |
| Integer division operator | represented by a backslash (\); divides two integers and then returns the quotient as an integer |
| Lifetime | indicates how long a variable or named constant remains in the computer’s main memory |
| Literal type character | a character (such as the letter D) appended to a literal for the purpose of forcing the literal to assume a different data type (such as Decimal) |
| Modulus operator | represented by the keyword Mod; divides two numbers and then returns the remainder of the division |
| Named constant | a computer memory location where programmers can store data that cannot be changed during run time |
| Private keyword | used to declare class-level memory locations (variables and named constants) |
| Procedure scope | the scope of a procedure-level memory location (variable or named constant); refers to the fact that the memory location can be used only by the procedure that declares it |
| Procedure-level named constants | named constants declared in a procedure; the constants have procedure scope |
| Procedure-level variables | variables declared in a procedure; the variables have procedure scope |
| Process symbols | the rectangles in a flowchart |
| Promoted | the process of converting a value from one data type to another data type that can store either larger numbers or numbers with greater precision |
| Pseudocode | a planning tool that uses phrases to describe the steps a procedure must take to accomplish its purpose |
| RAM | random access memory |
| Random access memory | the main memory of a computer |
| Scope | indicates where a memory location (variable or named constant) can be used in an application’s code |
| SelectAll method | used to select all of the text contained in a text box |
| Start/stop symbol | the ovals in a flowchart |
| Static keyword | used to declare a static variable |
| Static variable | a procedure-level variable that remains in main memory and also retains its value until the application (rather than its declaring procedure) ends |
| String | a sequence of characters (numbers, letters, special characters, and so on) |
| String.Empty | the value that represents the empty string in Visual Basic |
| TextChanged event | occurs each time the value in a control’s Text property changes |
| ToString method | formats a copy of a number and returns the result as a string |
| TryParse method | used to convert a string to a specified numeric data type |
| Variable | a computer memory location where programmers can temporarily store data, as well as change the data, during run time |
Created by:
Leisac
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