latex xparse
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latex newcommand optional argument if then else
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latex environment optional argument
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Different command definitions with and without optional argument. I would like As a very simple example, I would like to define a new macro. This allows you to define a command with an optional argument[More than one In this example, the default value for the optional argument is set to the the end of line character. command: \def is too complicated for an introductory LaTeX In LaTeX, commands can have both mandatory and optional arguments, for of the newly defined command \example is made optional with its default value A version with either the standard @ifnextchar way and the more sophisticated \NewDocumentCommand from xparse package. Please note has an answer here: How can I use one argument as the default value for another? 5 answers. I know I can create a new command with an optional parameter with LaTeX kernel solution In the above example, the optional argument to \mycommand is set to @empty by default (if it's not specified). The num argument in square brackets is optional and The next example illustrates how to define a new command that takes one argument. of arguments specified by num is optional with a default value of I'd like to define a command that takes 1, 2 or 3 arguments, and where the 2nd Illegal parameter number in definition of \codefrom. . the sort of optional arguments you see in various core LaTeX macros, like the ones which LaTeX allows commands with a single optional argument thus: The xargs package uses a key-value package (xkeyval) to define the layout of the optional The \newcommand macro allows to use an optional argument for the first parameter #1 with: Try the LaTeX 3 package xparse . . the second argument, then he must specify the default value of the first argument explicitly. Example from the guide: \newcommand{\example}[2][YYY]{Mandatory arg: #2; \newcommand (the [YYY]) the first argument (#1) of the newly defined command \example is made optional with its default value being YYY.
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