Visual Basic Data Types, Modules and Operators

8/3/2019 Visual Basic Data Types, Modules and Operators

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Code in Visual Basic is stored in the form of modules. The of modulthree kind es are FormModules, Standard Modules and Class Modules.

A simple application may contain a single Form,and the code resides in that Form module itself.As the application grows, additional Forms areadded and there may be a common code to be

executed in several Forms. To avoid theduplication of code, a separate modulecontaining a procedure is created thatimplements the common code. This is astandard Module.


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2.StringA sequence of one or more characters that are enclosed withindouble quotation marks ( a Z Anne *)

3.Date

For date values data type ( Birthdate = #Sept-12-87# )4.BooleanBoolean data types hold either a true or false value. Values areinternally stored as -1 (True) and 0 (False) and any non-zero valueis considered as true.

5.Decima

lRefers to any large numerical value whether it is an integer orfloating point.

6.ObjectRefers to objects within Visual Basic application or otherapplication ( Dim objDb as Object)


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Arithmetic

Operators Description Example Result

+ Add 5+5 10

- Substract 10-5 5

/ Divide 25/5 5

\ Integer Division 20\3 6

* Multiply 5*4 20

^ Exponent (power of) 3^3 27

Mod Remainder of division 20 Mod 6 2

& String concatenation "George"&" "&"Bush""George Bush"


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Relational

Operators Description Example Result

> Greater than 10>8 True

< Less than 10= Greater than or equal to 20>=10 True


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Logical

Operators Description

OROperation will be true if either of the

operands is true

ANDOperation will be true only if both the

operands are true


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What are the programming fundamentals of

visual basic?

How important are those in designing and

developing an application program?

Using the Addition Calculator Application,explain how the programming fundamentals

are applied in the design of the application.


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A. Identify which does not belong to the group.

___1. a. string b. long c. variant d. Date

___2. a. quadruple b. double c. single d. Currency

___3. a. boolean b. date c. arithmetic d. String___4. a. greater than b. OR c. ampersand d. Integer

___5. a. arithmetic b. declaration c. logical d. Relational

___6. a. True b. AND c. $ d. *

___7. a. @ b. % c. # d. 6___8. a. procedure b. form c. class d. Standard

___9. a. 2^2 b. 5*3 c. 7 mod 2 d. 10 %

___10. a. and b. * c. & d. mod


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Value DataType

1. True2. 200

3. +1434. 33,0005. 3.1416

6. -15


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Thank You

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Visual Basic Data Types, Modules and Operators