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The `.emacs' file contains one or more Lisp function call
expressions. Each of these consists of a function name followed by
arguments, all surrounded by parentheses. For example, (setq
fill-column 60) calls the function setq to set the variable
fill-column (see section Filling Text) to 60.
The second argument to setq is an expression for the new value of
the variable. This can be a constant, a variable, or a function call
expression. In `.emacs', constants are used most of the time. They can be:
- Numbers:
-
Numbers are written in decimal, with an optional initial minus sign.
- Strings:
-
Lisp string syntax is the same as C string syntax with a few extra
features. Use a double-quote character to begin and end a string constant.
In a string, you can include newlines and special characters literally.
But often it is cleaner to use backslash sequences for them: `\n'
for newline, `\b' for backspace, `\r' for carriage return,
`\t' for tab, `\f' for formfeed (control-L), `\e' for
escape, `\\' for a backslash, `\"' for a double-quote, or
`\ooo' for the character whose octal code is ooo.
Backslash and double-quote are the only characters for which backslash
sequences are mandatory.
`\C-' can be used as a prefix for a control character, as in
`\C-s' for ASCII control-S, and `\M-' can be used as a prefix for
a Meta character, as in `\M-a' for Meta-A or `\M-\C-a' for
Control-Meta-A.
- Characters:
-
Lisp character constant syntax consists of a `?' followed by
either a character or an escape sequence starting with `\'.
Examples:
?x, ?\n, ?\", ?\). Note that
strings and characters are not interchangeable in Lisp; some contexts
require one and some contexts require the other.
- True:
-
t stands for `true'.
- False:
-
nil stands for `false'.
- Other Lisp objects:
-
Write a single-quote (') followed by the Lisp object you want.
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