Difference between revisions of "ShortString"
(add warning regarding low) |
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| Line 29: | Line 29: | ||
s := 4; | s := 4; | ||
</syntaxhighlight> | </syntaxhighlight> | ||
| − | + | ||
| + | == Caveats == | ||
| + | {{Warning|<syntaxhighlight lang="pascal" inline>low(myShortString)</syntaxhighlight> returns <syntaxhighlight lang="pascal" inline>0</syntaxhighlight>, i. e. the index of the length Byte, not the first character’s index. Likewise, <syntaxhighlight lang="pascal" inline>high(myShortString)</syntaxhighlight> always returns <syntaxhighlight lang="pascal" inline>255</syntaxhighlight>. Use <syntaxhighlight lang="pascal" inline>length</syntaxhighlight> instead.}} | ||
| + | Nevertheless, a [[for-in loop|<syntaxhighlight lang="pascal" inline>for … in</syntaxhighlight> loop]] will work as expected. | ||
| + | |||
== See also == | == See also == | ||
| − | |||
* [[Data type|Data types]] | * [[Data type|Data types]] | ||
* [[Character and string types]] | * [[Character and string types]] | ||
Revision as of 16:03, 14 February 2021
│ English (en) │
Memory requirement: 256 bytes (1 byte for the length specification and 255 bytes for the characters).
Property: The data field of the data type Shortstring is an array, made up of data fields of the data type Char. Its length is defined as: ShortString = String[255];
ShortString has the same properties as the string in Turbo Pascal.
Definition of a data field of the data type ShortString:
var
s : ShortString;
Examples for the valid assignment values:
s := '0123ABCabc456';
s := s + '! "§ $% & / () =?';
s := 'c';
s := s + IntToStr (45);
Examples of invalid assignment of values:
s := True;
s := 4;
Caveats
Warning: low(myShortString) returns 0, i. e. the index of the length Byte, not the first character’s index. Likewise, high(myShortString) always returns 255. Use length instead.
Nevertheless, a for … in loop will work as expected.
