How to make the first argument optional in latex?

How to make the first argument optional in latex?

But by adding a second optional argument to this newcommand (the [YYY]) the first argument (#1) of the newly defined command example is made optional with its default value being YYY.

How are ordered lists generated in LaTeX editor?

The ordered lists are generated by a \\enumerate environment and each entry must be preceded by the control sequence \\item, which will automatically generate the number labelling the item. The enumerate labels consists of sequential numbers, these numbers starts at 1 with every call to the enumerate environment.

Which is an example of an optional argument?

In fact you can use two optional arguments, the first specifying the number of parameters, the second defining a default value for the first one which then will be an optional parameter. So ewenvironment{ Example } [2] [Example] { This is an #1. You gave #2 as an argument. The rest will be bold: \\bfseries} {}

How are environments used in a LaTeX document?

Environments are used to format blocks of text in a LaTeX documents. This article explains how to use environments and how to define new ones. Below you can see a very simple example on how to use an environment. begin{ center } This text will be centred since it is inside a special environment.

How to create new commands with latex Stack Exchange?

I’d like to create a new command \\add that accepts 2 arguments, called entity and title. In other words, the command should look like this: \\add {entity} {title}. The output should have the following form: extit {entity} ‘ {title}’.

Do you need to provide an optional argument for a command?

Now suppose we want our command to have an optional argument. By definition, the optional argument is always the argument designated #1 (i.e. the first argument). However, since the command still has a first argument even if it’s left out by the user, we still need to provide a value for it. So the syntax of the command changes:

Can you pass anything to newcommand argument confusion?

As Przemysław Scherwentke says in his answer, you could actually pass anything to this command, not just a formatting command, so if, for example, you forgot the \\ on \\itshape:

How to answer a question in TeX LaTeX Stack Exchange?

Thanks for contributing an answer to TeX – LaTeX Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience.

What are the two forms of conditionals in Tex?

Specially, conditionals in TeX have one of the following two forms where \\if here is used generically to reference a whole host of conditionals ( \\if, \\ifcat, \\ifx, \\ifdim, \\ifnum.). It uses a nesting of \\ifx and \\if conditionals. Let’s look at the outer \\ifx definition first.

How is equality of tokens tested in TeX LaTeX?

Equality of tokens is tested in a stronger sense […] by […] Control sequences are […] equal if they are macros with the same parameter text and replacement text, and the same status with respect to \\outer and \\long. For example, Tokens following this test are not expanded.