Tests if the letters in a character string are uppercase.
$isupper(string)| string | a character string or an expression that evaluates to a character string |
1-character binary string. Evaluates to 1 ($True) if string meets the validation test; otherwise, evaluates to 0 ($False).
This function tests if a particular character string is uppercase, i.e., contains no lowercase letters.
$isupper("aBC")Evaluates to $False.
$isupper(43)
Evaluates to $True.
Tests if a character string contains only letters.
$isalphabetic(string)| string | a character string or an expression that evaluates to a character string |
1-character binary string. Evaluates to 1 ($True) if string meets the validation test; otherwise, evaluates to 0 ($False).
This function tests if a particular character string is alphabetic.
$isalphabetic("abc")Evaluates to $True.
$isalphabetic("abc1")Evaluates to $False.
Tests if the letters in a character string are lowercase.
$islower(string)| string | a character string or an expression that evaluates to a character string |
1-character binary string. Evaluates to 1 ($True) if string meets the validation test; otherwise, evaluates to 0 ($False).
This function tests if a particular character string is lower case, i.e., contains no uppercase letters.
$islower("Abc")Evaluates to $False.
$islower(34)
Evaluates to $True.
Provides a default value for an expression that can be $Null.
$value(expression1,expression2)
| expression1 | any expression |
| expression2 | any expression |
Same as the selected expression.
If expression1 is not $Null, $value returns the value of expression1; otherwise, it returns the value of expression2.
detail line "Employee Number: " $value(EmpNum,"N/A")
Traps $Null values in a report and replaces them with “N/A”.
File system path where one of the Zim executables started.
A character string. Cannot be reset by an application program.
C:\MyDirSubDir> zxclient -n mybase
After invoking ZXCLIENT, in the prompt:
> OUTPUT $startpath C:\MyDirSubDir
Exits from a WHILE loop.
BREAK
Upon encountering a BREAK command, the software continues execution at the first command following the ENDWHILE of the “innermost WHILE loop” containing the BREAK.
Any IF or CASE statements that are still open when a BREAK command is executed are automatically closed.
Consider the following code fragment:
while var1 > 20
.. some commands …
if var2 = 1
break
else
… more commands …
endif
… still more commands …
endwhile
… commands after the WHILE loop …
When var2 is set to 1, the only commands executed in the above sequence are “some commands” and “commands after the WHILE loop”. Commands between the BREAK and ENDWHILE commands are ignored, and the “open” IF statement is automatically closed.
Determines the day name associated with a specified date value.
$dayname(date)| date | a data, or an expression that evaluates to a date, in the form YYYYMMDD |
Character string.
This function extracts day information from standard date values. Date is often the system variable $Date.
The values returned by the $dayname function can be altered with the Language Customizer utility.
$dayname (19991225)
Evaluates to “Saturday”.
$dayname ($date+7)
Evaluates to “Saturday” when $Date is 19991225.
Tests if a character string contains only letters and digits.
$isalphanumeric(string)| string | a character string or an expression that evaluates to a character string |
1-character binary string. Evaluates to 1 ($True) if string meets the validation test; otherwise, evaluates to 0 ($False).
This function tests if a particular character string is alphanumeric.
$isalphanumeric("abc1")Evaluates to $True.
$isalphanumeric("abc ")Evaluates to $False.
Left-justifies a character string.
$leftjustify(string)| string | a character string or an expression that evaluates to a character string |
Character string.
String is left-justified in a space that is $length(string) characters long. Leading spaces in string are ignored.
$leftjustify(" abcde")Evaluates to “abcde “.
$leftjustify(var1)
Evaluates to “3 ” if var1 is a LONGINT variable whose value is 3 (occupies 12 character spaces when converted to a string).
Clears the screen and establishes the application window (BACKSCREEN) as the current window.
SCREEN CLEAR
The SCREEN CLEAR command clears the contents of the application window (BACKSCREEN), hides any other windows that are currently displayed, makes the application window the current window, and places the cursor at the top, left-hand corner of the application window.
Although hidden, all other windows remain open and active. To re-display the hidden windows, use either the SCREEN RESET or WINDOW DISPLAY BACKSCREEN HIDE command.
window clear backscreen
window set current backscreen
window display backscreen
The SCREEN CLEAR command is equivalent to the preceding sequence of commands.
screen clear % clear prev. data & expose application window
output “Output to printer? (y/n)” ;
input Response
if Response = “y”
set output printer
endif
screen reset
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