Faq/Math/003/en

When I enter one of the symbols #, &, |, ", %, ^ or _ I get an error message or an undesired result. How can I use these symbols?
These symbols have special meanings in Math:
 * The   symbol is used with   and  .
 * The symbols   and   are used to indicate logical   and logical  , respectively.
 * The symbol   is used to indicate strings of characters.
 * The symbol   is used to indicate a predefined symbol name or a personal symbol as explained in this FAQ.
 * The symbols ^ and _ are used to indicate superscripts and subscripts, respectively.

To use one of these symbols in a formula, put it in quotation marks. For example:  . There is one exception: double quotes can not put itself between quotes. To be displayed, you need to insert an escape character   before: "\""

There are two uses of the | symbol for which Math has specific markup:
 * a divides b will display a | b
 * abs a will display |a|

Another solution would be to add an additional personal symbol as explained in this FAQ.