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1.1.3 Scheme simple data types
The most basic concept in a language is data typing: numbers, character strings, lists, etc. Here is a list of simple Scheme data types that are often used with LilyPond.
- Booleans
Boolean values are True or False. The Scheme for True is
#tand False is#f.- Numbers
Numbers are entered in the standard fashion,
1is the (integer) number one, while-1.5is a floating point number (a non-integer number).- Strings
Strings are enclosed in double quotes:
"this is a string"
Strings may span several lines:
"this is a string"
and the newline characters at the end of each line will be included in the string.
Newline characters can also be added by including
\nin the string."this\nis a\nmultiline string"
Quotation marks and backslashes are added to strings by preceding them with a backslash. The string
\a said "b"is entered as"\\a said \"b\""
There are additional Scheme data types that are not discussed here. For a complete listing see the Guile reference guide, http://www.gnu.org/software/guile/manual/html_node/Simple-Data-Types.html.
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