For example:
x := #123;
I tried to search around Google but I simply have no idea what this means.
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# is known as "Number sign", "hash symbol" or in the US "pound sign" – Nikko Jun 04 '10 at 14:43
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Thanks! I was looking for what it is called. – Yana D. Nugraha Jun 04 '10 at 14:50
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Ever heard of charmap.exe? # is U+0023: "NUMBER SIGN". – Andreas Rejbrand Jun 04 '10 at 14:51
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#123 = '{', by the way. (U+007B: "LEFT CURLY BRACKET") – Andreas Rejbrand Jun 04 '10 at 14:56
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You might want to look at the Delphi Language Guide: Top Level: http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate2/EN/html/devcommon/languageguidepart_xml.html Character literals: http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate2/EN/html/devcommon/fundamentalsyntacticelementsov_xml.html – Warren P Jun 04 '10 at 15:25
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IIRC it means a character value of the number (eg. #32 -> space).
jpalecek
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2#123 is the same thing as Chr(123), except it's a literal character constant instead of a builtin system function (Chr). – Warren P Jun 04 '10 at 15:27
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FWIW, these days, Chr(32) does nothing. In reality it is not even a function, it is completely equivalent to #32 and Char(32). – Rudy Velthuis Apr 28 '16 at 23:04
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What does == mean? In Delphi, you use := for assignments and = when testing for equality. The operator == does not exist. – Andreas Rejbrand Jun 04 '10 at 14:47
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sorry about that. == means "equivalent to". Edited answer for clarity – CheesePls Jun 04 '10 at 14:54
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It is an extention to standard Pascal, Borland Pascal accepts the pound sign ('#') followed immediately by a decimal number between 0 and 255 as a single character with that code.
SQLMenace
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3Well, in Delphi 2009+ all strings are Unicode, so you are not restricted to codes between 0 and 255 any more. For example, #$222b is the integral sign. (In Delphi, $ is the hexadecimal prefix.) – Andreas Rejbrand Jun 04 '10 at 14:48
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You aren't restricted to that in prior versions, either, @Andreas. Delphi supported Unicode for more than a decade before Delphi 2009. – Rob Kennedy Jun 04 '10 at 15:01
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@Rob Kennedy: But you could not write Caption := #$222b and get an integral sign as the form's caption, right? – Andreas Rejbrand Jun 04 '10 at 15:51
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Yes, @Warren. Delphi 4 supported them, and that was released in 1998. Andreas, you're right. – Rob Kennedy Jun 04 '10 at 17:52
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As other have mentioned it's a character code, I most often see them used for line breaks in messages, or other control character such as Tab (#9)
ShowMessage('Error:'#13#10'Something terrible happened')
Strangely it's not necessary to concatinate a string involving these.
James
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