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Chapter 4. Basic Program Elements
59
4.3 Labels
A label can contain the following characters:
• Alphabet characters
• Numeral characters
• Period (.)
■
Rules for naming labels
• The label length should be limited to 10 characters including periods.
• A program can contain up to 9999 labels.
• Label names make no distinction between uppercase and lowercase letters.
The following labels, for example, will be treated as the same label.
filewrite
FILEWRITE
FileWrite
• No asterisk (*) or dollar sign ($) should be used for a label. The following label examples
are invalid:
*Label0
Label1$
• A label made up of only numeral letters as shown below is valid.
1000
1230
Note that a single 0 (zero) should not be used as a label name since it has a special
meaning in
ON
ERROR
GOTO,
ON
KEY
...
GOSUB
, and
RESUME
statements.
• A reserved word cannot be used by itself for a label name, but can be included within a
label name as shown below.
inputkey
• A label should not start with the character string
FN
.
Содержание BHT-BASIC 100 SERIES
Страница 1: ......
Страница 161: ...153 Chapter 10 Sleep Function CONTENTS 10 1 Sleep Function 154...
Страница 163: ...155 Chapter 11 Resume Function CONTENTS 11 1 Resume Function 156...
Страница 173: ...165 Chapter 13 Backlight Function CONTENTS 13 1 Backlight Function 166...
Страница 192: ...Chapter 14 Statement Reference 184 Example OPEN master Dat AS 1 FIELD 1 20 AS bar 10 AS ky CLFILE 1 CLOSE 1...
Страница 249: ...241 Example CLOSE IF kyIn Y THEN KILL Master Dat END IF Reference Statements CLFILE...
Страница 349: ...341 Run time errors Error code Meaning 05h Parameter out of the range checktype is out of the range...
Страница 383: ...375 Run time errors Reference Error code Meaning 05h Parameter out of the range Functions LEFT LEN and RIGHT...