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Visual BASIC Programming > Chapter 1 - 3 > Flashcards

Chapter 1 - 3 Flashcards

1
Q

GUI

A

Graphical User Interface

windows, icons, and menus that can be manipulated by a mouse

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2
Q

Program

A

a collection of instructions that directs the hardware; software; project; application; solution

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3
Q

Input

A

the data necessary to obtain the output

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4
Q

Output

A

what the task produces

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5
Q

Processing

A

determine what formulas or ways of doing things should be used to obtain the output

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6
Q

Programmer

A

developer; person who solves problems by writing programs on a computer

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7
Q

User

A

any person who runs a program

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8
Q

Program Development Cycle

A

devising a carefully thought out step-by-step process that enables programmers to use their time efficiently and help them design error-free programs that produce the desired output

The Steps: Analyze, Design, Design the Interface, Code, Test and Correct, Complete the Documentation

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9
Q

Flowchart

A

consists of special geometric symbols connected by arrows; within each symbol is a phrase presenting the activity at that step; the shape of the symbol indicates the type of operation that is to occur

Flowline (arrow) - used to connect symbols and indicate the flow of logic

Terminal (rounded rectangle) - used to represent the beginning (Start) or the end (End) of a task

Input/Output (parallelogram) - used for input and output operations, such as reading and displaying

Processing (rectangle/square) - used for arithmetic and data-manipulation operations

Decision (diamond) - used for any logic or comparison operations; has two exit paths, one for “yes” and one for “no”

Connector (circle) - used to join different flowlines

Annotation (divining rod) - used to provide additional information about another symbol

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10
Q

Pseudocode

A

an abbreviated plain English version of actual computer code; English-like statements that outline the process

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11
Q

Form

A

a blank window

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12
Q

Control

A

objects added to a form

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13
Q

IDE

A

Integrated Development Environment (Visual Basic is an example)

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14
Q

Menu Bar

A

displays the menus of commands you use to work with Visual Basic

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15
Q

Tool Bar

A

holds a collection of buttons that carry out standard operations when clicked

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16
Q

Toolbox

A

holds icons representing objects that can be placed on the form

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17
Q

Solution Explorer

A

displays the files associated with the program and provides access to the commands that pertain to them

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18
Q

Textbox

A

a type of control used to get information from the user, referred to as input, or to display information produced by the program, referred to as output

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19
Q

Label

A

controls placed near text boxes to tell the user what type of information is displayed in the text boxes

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20
Q

Button

A

control that the user clicks on to initiate an action

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21
Q

List Box

A

control used to display output and/or make selections

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22
Q

Property: Text

A

determines the words displayed

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23
Q

Property: Name

A

indicates the name of an object

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24
Q

Property: Visible

A

indicates visibility of an object

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25
Property: Enabled
returns or sets a Boolean value that indicates whether permissions are enabled on the active document
26
Property: Font
indicates the font of an object's text
27
Property: ForeColor
indicates the foreground color used to display text and graphics in an object
28
Property: BackColor
indicates the background color of an object
29
Tab: Tab Stop
indicates whether or not tabs are allowed to be entered directly into a control
30
Tab: Focus
indicates which control is focused on using the tab key
31
Naming Controls
series of letters, digits, and underscores must begin with a letter cannot be a reserved key word (turns blue) not case sensitive for consecutive words, first word is low caps and successive words have first letters capitalized
32
Snap Lines
when activated, this feature causes a line to be drawn between an edge of the control you are currently moving and and the corresponding edge of the closest control on the form when the edges are in alignment
33
Events
a signal that informs an application that something important has occurred; events also allow separate tasks to communicate
34
Procedures
a block of Visual Basic statements enclosed by a declaration statement (Function, Sub, Operator, Get, Set) and a matching End declaration; all executable statements in Visual Basic must be within one of these
35
Code Editor
a window where you write most of your code; a highly specialized word processor with a number of features that make writing Visual Basic code a lot easier
36
Intellisense
general term for a number of features: List Members, Parameter Info, Quick Info, and Complete Word these features help you to learn more about the code you are using, keep the parameters you are typing, and add calls to properties and methods with only a few keystrokes; language-specific
37
Assignment Statements
carry out assignment operations, which consist of taking the value on the right side of the assignment operator (=) and storing it in the element on the left
38
Keywords
reserved; you cannot use them as names for programming elements such as variables or procedures; you can bypass this restriction by enclosing the name in brackets [ ]
39
Event: Click
occurs when the control is enabled and the user both presses and releases a mouse button while the mouse pointer is over the control
40
Event: Leave
occurs when the input focus leaves the control
41
Event: Enter
occurs when the control is entered
42
Method
a process that performs a task for a particular object | ends with a set of parentheses( )
43
Variables
store values; has a name and data type
44
Declarations
Statement - to name and define procedures, variables, properties, arrays, and constants; Dim statement Variable - specify its name and characteristics
45
Double
positive and negative number that can have decimals
46
Integer
positive and negative whole number
47
String
``` text; sequence of zero or more items treated as a single item Examples: "Hello" "Bill Gates" "The rain in Spain . . . " ```
48
Initial Value
when making a Dim statement, this is what comes after As
49
Initialize
assign an initial value for a data object or variable
50
Incrementing a Variable
``` to add or subtract one to the numeric variable var var = var + 1 or var = var - 1 ```
51
Math Functions
the methods of this system provide trigonometric, logarithmic, and other such common types of these
52
Math Operators
+, -, *, / \ is integer division (gives whole number) Mod(ulus) provides a remainder from integer division
53
Order of Precedence
never rely on the order of precedence; use parentheses to group statements, such as (2 * 3) + 4 instead of 2 * 3 + 4 and (2^3) + 4 instead of 2^3 + 4
54
Converting Strings to Doubles and Integers
``` CDbl(txtBox) - for Double CInt(txtBox) - for Integer Example: Dim Age As Integer/Double Age = CInt/CDbl(txtAge.Text) ```
55
Concatenation and Append
operators join multiple strings into a single string | operators are + and &
56
Empty String
string with no contents ""
57
Comments
brief explanatory notes preceded by ' added to code for the benefit of those reading it
58
Scope of a Variable
the set of all code that can refer to it without qualifying its name or making it available through an Imports Statement (.NET Namespace and Type); specified when a variable is declared; portion of a program that sees a variable
59
Named Constant
"variable" whose value does not change; makes programs easier to understand and update; use Upper case letters Example: ConstTAX_Rate As Double = 0.05 ConstMINIMUM_WAGE As Double = 7.25
60
String and Format Functions
functions that search and/or manipulate strings
61
Error: Syntax
misspellings, omissions, incorrect punctuation, etc.
62
Error: Runtime
overflow, etc. Example: Dim numVar As Integer = 1000000 numVar = numVar * numVar
63
Error: Logic
``` Example: Dim Average As Double Dim m As Double = 5 Dim n As Double = 10 average = m + n / 2 <--Forgot the parentheses around the formula ```

Visual BASIC Programming (3 decks)

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