1. Prepared By: Deborah Becker
Built-In Functions
Chapter 3.6
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2. Prepared By: Deborah Becker
Topics
Common Built-In Functions
Numeric Functions
Val() and Str()
String Functions
Formatting Functions
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3. Common Built-In Functions
Types
Formatting
Numeric
String
Date & Time
File handling
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Formatting & Printing
Using the Print Zones
Each line in a Picture box object or paper line is divided into zones.
Each zone contains 14 positions about the size of a printed character
We use the Print method of the picture box to display our output
We use Commas and Semicolons to separate items on the print line
Using Commas will display the data in different print zone
Using Semicolons will display the data in a line with no spaces.
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Examples
picDisplay.Print strName, strPhone
Deborah Becker (816)
picDisplay.Print strname; strPhone
Deborah Becker(816)
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The Tab() function
Tab(n)
This function is used to position data into the various positions on the print line
n Represents the position on the line where the data item will print.
Example
picDisplay.Print strName; Tab(20); strPhone
Deborah Becker (816)
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7. Prepared By: Deborah Becker
Spc() Function
The Spc(n) function is used Print and Print# statements to generate spaces.
Example
picDisplay.Print strName; Spc(5); strPhone
Deborah Becker (816)
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8. Common Numeric Functions
Sqr(NumericVariable)
Sqr(9) = 3
Sqr(319) =
Int(NumericVariable)
Int(3*5.9) = 17
Int(-2.7) = 3
The values inside the function can be number, numeric variables or numeric expressions
Round(curPartPrice * IntQtyOrder, Digits) Round(2.356 * 5, 3) =
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Other Functions
Val(Text Expression)
User Input into TextBox
Store results of Calculation
Converts string variable to numeric value
Produces an error if input is not numeric
Useful is data is stored in string format
Str(Numeric Expression)
Converts Input in a TextBox to Numeric
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Solve These Functions
sngPrice = Val(“3.16”)*5
sngPrice = int(3.16 * 5)
sngPrice = Round(3.16*5)
sngPrice = int(3.16) * 5
15.8 15
15.8 15
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11. Prepared By: Deborah Becker
String Functions
Left(strVariable,Number of Characters)
Mid(strVariable, StartPosition,#Characters)
Ucase(srtVariable)
Trim(“ “)
Right(strVariable, Number of Characters)
From the right most character
Len(strVariable)
Instr(strVariable, String Pattern)
Returns the starting position in the string
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Solve These Examples
Left(“CIS202”, 3)
Right(“CIS202”,3)
Mid(“Visual Basic”, 3, 2)
Ucase(“visual Basic”)
Lcase(“COMPUTERS”)
Len(“Watcher, the Movie”)
Instr(“Watcher, the Movie”, “at”)
If the str2 is not a subset of str1 the values = 0
Else if str2 is a subset of str1 the value = the starting position of str2. (2)
Trim(“ This class is too Early “)
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13. Prepared By: Deborah Becker
Date and Time
Function
FormatDateTime(dtmClassTime,vbLongDate)
FormatDateTime(dtmClassTime,vbShortDate)
Monday, September 18, 2000
09/18/00
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Formatting Numbers
formating symbol is used to line up numbers and decimal points in output
FormatNumber()
FormatCurrency()
FormatPercent()
FormatDateTime()
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Setting TxtBox.Text
txtBox.text = FormatNumber( ,0)
txtBox.text = FormatCurrency(123.45)
txtBox.text = FormatCurrency(123.45,0)
Use a format function to correctly display the following
currency
09/18/00 long date
currency no cents
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Prepared By: Deborah Becker