If we want to produce -9, typing
-9 in an input file is not correct because
- is intentionally designed for hyphenation so its glyph is bad to represent the minus sign.
To produce the minus sign, we use
$-$ instead of
-. My question is, should a number be enclosed in
$ together with the
- if we want to render a negative number?
In other words, which one is recommended in text mode:
In other words, which one is recommended out of:
$-$9 is a negative number.
$-9$ is a negative number.