fish-shell/doc_src/math.txt


\section math math - Perform mathematics calculations

\subsection math-synopsis Synopsis
\fish{synopsis}
math EXPRESSION
\endfish

\subsection math-description Description

`math` is used to perform mathematical calculations. It is a very thin wrapper for the bc program, which makes it possible to specify an expression from the command line without using non-standard extensions or a pipeline.

For a description of the syntax supported by math, see the manual for the bc program. Keep in mind that parameter expansion takes place on any expressions before they are evaluated. This can be very useful in order to perform calculations involving shell variables or the output of command substitutions, but it also means that parenthesis have to be escaped.


\subsection math-example Examples

`math 1+1` outputs 2.

`math $status-128` outputs the numerical exit status of the last command minus 128.
Update documentation display code to run roff on the client system instead of pregenerating documentation and compiling it into program binaries darcs-hash:20061117162438-ac50b-5c4c7f0bd8bf53a16e16ecfead9569e642b7160f.gz 2006-11-18 00:24:38 +08:00
			`\section math math - Perform mathematics calculations`

			`\subsection math-synopsis Synopsis`
Simplify styling 2014-08-01 20:25:41 +08:00			`\fish{synopsis}`
Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00			`math EXPRESSION`
			`\endfish`
Update documentation display code to run roff on the client system instead of pregenerating documentation and compiling it into program binaries darcs-hash:20061117162438-ac50b-5c4c7f0bd8bf53a16e16ecfead9569e642b7160f.gz 2006-11-18 00:24:38 +08:00
			`\subsection math-description Description`

Make line length, wrapping and spacing consistent 2014-08-19 20:41:23 +08:00			`math` is used to perform mathematical calculations. It is a very thin wrapper for the bc program, which makes it possible to specify an expression from the command line without using non-standard extensions or a pipeline.

			`For a description of the syntax supported by math, see the manual for the bc program. Keep in mind that parameter expansion takes place on any expressions before they are evaluated. This can be very useful in order to perform calculations involving shell variables or the output of command substitutions, but it also means that parenthesis have to be escaped.`

Extend documentation for the math function darcs-hash:20061212171037-ac50b-1b9d0f51b284925fe0fc3020774ec32bb1414ce7.gz 2006-12-13 01:10:37 +08:00
Help cleanup Large list of changes, including formatting and typos for most commands. More substantive changes have been made to alias, bind, block, break, builtin, case, cd, commandline, count, else, emit, fish_config, funced, function, functions, history, math, mimedb, nextd, not, popd, prevd, pushd, pwd, random, read, set, set_color, switch, test, trap, type, ulimit, umask, and while. 2013-05-12 15:56:01 +08:00			`\subsection math-example Examples`

Documentation update Rework for Doxygen >1.8. Moved large parts of the documentation to a simplified format, making use of Markdown enhancements and fixing bad long options. 2014-08-01 10:37:32 +08:00			`math 1+1` outputs 2.
Help cleanup Large list of changes, including formatting and typos for most commands. More substantive changes have been made to alias, bind, block, break, builtin, case, cd, commandline, count, else, emit, fish_config, funced, function, functions, history, math, mimedb, nextd, not, popd, prevd, pushd, pwd, random, read, set, set_color, switch, test, trap, type, ulimit, umask, and while. 2013-05-12 15:56:01 +08:00
Make line length, wrapping and spacing consistent 2014-08-19 20:41:23 +08:00			`math $status-128` outputs the numerical exit status of the last command minus 128.