Question

Delphi strings use single quotes, for example ‘a valid string‘. How does one specify the ' character within a literal string? How would one refer to the null byte (Unicode code point U+0000)?

Answer 1

To add a single quote to a string, you include two ' marks e.g.

str := '''test string'''; Writeln(str) 

In the string above, you have the normal single quotation to start a string and then two for the single quote. Same goes for the end of the string.

You can also use # followed by a number for other escape character e.g.
For a new line:

str := 'Newline' + #13 + #10  

or just

str := 'Newline'#13#10 

Of course, using the platform-dependent constant for newline is better.