Ifnum latex 5, or How TeX macros actually work: Part 4). So, printing of 0. Add a comment | 3 Answers Sorted by: Reset to default 15 You can not use floating variables. Raw TeX does not have amenities such as compound Boolean operators. To do this I have attempted to use \\pgfmathparse and \\ifnum in order to decide if to colour a As the closing \fi is following directly thereafter the whole thing \ifnum\z@=`}\fi expands to nothing independent on the actually number value. in paths. この記事はLaTeXでプログラミングしてみよう（前編）の続きです。まだ読んでいない方は、先に前編を読むことをオススメします。実践さて、前編ではLaTeXでプログラミングするのに必要となる基礎知識 簡単に使用できるオンラインLaTeXエディター。インストール不要、リアルタイムコラボレーション、バージョン管理、何百種類のLaTeXテンプレートなど多数の機能。 Macro \total of package is not expandable, it starts with a definition. Explore if-then-else structures, boolean expressions, and practical {score}{85} \ifnum\value{score}> 90 Excellent score! \ else \ifnum\value{score}> 80 Good score. Thank you for your help. Comparing two integers: \ifnum\value{num}>n {A} \else {B}\fi. Skip to content. If a number is odd: \ifodd\value{num} {A}\else {B}\fi. As for the patch, the original version treats the whole mark@corau\theauthor as a single number, so it breaks when you As shown by egreg on this thread, using the \ifstrempty command from the etoolbox package, it's possible to test if the given string is empty or not, with the added bonus that linebreaks in the given string won't cause problems. <to be read again> A l. However, neither slashbox nor diagbox (more recent and maintained) apparently can be used in array. \else 11 equals 0. There are some ways: Using a \ifdim by-pass (like in the answers by David Carlisle and Heiko Oberdiek) or the expl3 style with \fp_compare:nNnF which checks for the floating point 'entity'. 10 \hline I expect to see \noalign only after the \cr Read \if_integer_number#1=another_integer_ and not floating point numbers. Features; For business; For universities; For publishers; In general, the plus-minus symbol is generated in LaTeX with the \pm command inside math mode. Just a note, most of the times graphicx is smart enough to detect the correct driver on its own, and you don't have to specify \usepackage[pdftex]{graphicx} but just do \usepackage{graphicx}. Features & Benefits. – egreg. Questions. Stack Exchange network A way out is to tell LaTeX to set every column in Stack Exchange Network. Viewed 39k times {introduction} % includes latex files from the same directory \include{packages} % could be called Methodology or methods or anyfile name \include{structure} % could be results \include No installation, real-time collaboration, version control, hundreds of LaTeX templates, and more. \else Counter X ist größer oder gleich 10. ) \ifnum can't be used with floating point numbers, i. It does it by comparing 1 with 0#1. 65. Here is an example using this command in a macro to test if string #1 is empty : \usepackage{etoolbox} \newcommand{\Test}[1]{% Applying a macro to all numbers in a document globally is so far I know not possible. These are set as \chapter* or numberless chapters. 1), but your pstricks package appears to be far older than mine Ok, I never cared about the TeX bundle available through the Linux-distri, rather, I installed TeX Live directly. There are, however, cases in which TikZ expects some explicit character, or so. The `\count` command can be used to count the number of elements in a list. 4 ? Not sure what this means exactly. The numbers are in the form 0. ! Missing = inserted for \ifnum. Tags. 30. Oddly, this conference template is where these odd errors show up. <to be read again> v 1. はじめにこの記事は群馬高専 Advent Calendar 2024 13日目の記事です。普段私がレポートや課題などでLaTeXを書く際に、とりあえずでまとめたテンプレートを紹介します。「この書 Generally you can use \ifnum etc. \ else \ifnum\value{score}> 70 Average score. Tags; Topics; Examples; eBooks; Download latex (PDF) latex. – barbara beeton An online LaTeX editor that’s easy to use. So a working code, combining the previous answers could be: \documentclass[11pt] See the LaTeX manual or LaTeX Companion for explanation. Thus the space-token An online LaTeX editor that’s easy to use. Instead, you must nest your conditionals: \newcount\X \X=10 \newif\ifGEzero \loop \the\X\endgraf \advance \X by -1 % The spaces after the 0's are important \ifnum\X>0 \GEzerotrue \else \ifnum\X=0 \GEzerotrue \else\GEzerofalse \fi \fi \ifGEzero \repeat \bye If \pgfutil@ifundefined (also the same with LaTeX's \@ifundefined) is called, \directlua gets defined with meaning \relax. RIP Tutorial. it is meant for integer values only. \documentclass{article} \usepackage{tikz} \begin{document} \begin{tikzpicture} \draw (0,0) rectangle %node{\ifnum0=1\relax My Label\fi} % Works correctly when the value = TeX has the \ifnum conditional (and also \ifcase), but you may be better off using etoolbox's arithmetic tests. Everything works perfectly - but for some reason, as soon as I include hyperref, everything breaks:Incomplete \ifnum; all Learn latex - Loops - repeating things. \documentclass{article} \usepackage{algorithm} \usepackage[noend]{algpseudocode} \begin{document} \begin{algorithm} Unfortunately TeX doesn't support \ifnum with <= and >= at primitive level because the author of TeX expected that programmers are able to use the negation, if it is needed. In LaTeX the symbol for material implication is produced by $\to$, but for biconditional? symbols; math-operators; logic; Share. 10 \hline I expect to see \noalign only after the \cr @kammad93 Lots of things. Keine Installation notwendig, Zusammenarbeit in Echtzeit, Versionskontrolle, Hunderte von LaTeX-Vorlagen und mehr An online LaTeX editor that’s easy to use. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site Hi. I provide two possible solutions, although I would note you probably dont want % Digit-character-token "0" of `\ifnum`'s second TeX-<number>-quantity found, thus the process of % gathering tokens that belong to \ifnum's second TeX-<number>-quantity is still in progress and now % forms a process of gathering more digit-character-tokens or something that terminates the % process of gathering, hereby expanding expandable tokens: @tjk8000 Yeah, I really don't see the point of this els-cas thingy, mainly because they use their own typesetting system (definitely not LaTeX), so elsarticle was good enough (and I doubt bugs will be fixed: the development seems to be stalled). \hline ->\noalign {\ifnum 0=`}\fi \hrule \@height \arrayrulewidth \futurelet l. Ein einfach bedienbarer Online-LaTeX-Editor. pdf in das Thema hinein, hat dann aber nicht zum Anschließen. If num is odd then it executes A else B. Here is a problem that has been puzzling me for a few days. If with condition: \ifthenelse{condition}{A}{B} We have to load LATEX Mathematical Symbols The more unusual symbols are not defined in base LATEX (NFSS) and require \usepackage{amssymb} 1 Greek and Hebrew letters α \alpha κ \kappa ψ \psi z \digamma ∆ \Delta Θ \Theta β \beta λ \lambda ρ \rho ε \varepsilon Γ \Gamma Υ \Upsilon I am trying to produce a 6-by-6 checkboard of small circles, alternating colour between red and black. No installation, real-time collaboration, version control, hundreds of LaTeX templates, and more. \tikzset{fpu} \pgfmathparse{int(0)}\show\pgfmathresult Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company No installation, real-time collaboration, version control, hundreds of LaTeX templates, and more. From the pdfTeX user manual: \pdfstrcmp{<general text>}{<general text>} (expandable) This command compares two strings and expands to 0 if the strings are equal, to -1 if the first string ranks before the second, and to 1 otherwise. Here is an example using this command in a macro to test if string #1 is empty : \usepackage{etoolbox} \newcommand{\Test}[1]{% Missing = insterted for \ifnum. Type H <return> for immediate help Try typing <return> to proceed. Sign up or log in to customize your list. Then the test: \if 11<>0 11 is not equal 0. Getting started with latex; Accessing documentation of LaTeX packages; Add Citation; \ifnum \value{int}<10 \repeat This code does I have a definition with 20 cases or so, and a proof about that definition has one case for each case of the definition. This code executes A if num>n else B. – Nicola Talbot Commented Dec 17, 2013 at 18:28 \MACROA hello1 \else world1 % next three lines cause trouble (nested ifnum) \MACROB hello2 \fi \fi Now \MACROA is expanded and you have s. We can substitute > with < and =. The former creates an algorithm floating environment, but in order to use algorithmic from algpseudocode, you should load algorithm instead (from the algorithms bundle). Visit Stack Exchange . 14190949656253118000 or 0. Basically, I try to parse strings and test their symbols one by one to define whether they are or not numbers (in order to achieve some more complicated treatment, beyond this topic). latex \ifnum\value{d}=0 \PackageError{mypackage}{Missing number d} \fi. That resolved my problem. more stack exchange communities company blog. LaTeX is Turing complete; that is, it can be programmed to compute just about anything. If you do, then you can add \global\let\M\M\global\let\N\N to the end of the 2nd branch of the \ifnum. e. That's also why they don't show up in the ToC, since \chapter* doesn't by default (you need to do this manually via \addcontentsline). Use values as percentage: \documentclass[pstricks,border=4pt]{standalone} \usepackage I want to check if a variable is less than 0 in a tikzpicture environment. \fi \end{document} When using LaTeX, can I just use $:=$, or do I need to do something special? Skip to main content. Log in; Sign up; Home In fact, the parameter #1 is not seen as a number by \ifnum. 1,147 2 2 gold badges 10 10 silver badges 15 15 bronze badges. th. My code, simplified, is \begin{center} \begin{animateinline}[loop, poster = first, \ifnum\dimexpr\relax<\dimexpr\relax works because scaling dimensions preserves the order. Commented May 9, 2021 at 17:41 @Alex – Your updated code hangs at the very beginning. If #1 is a number, the \ifnum comparison works in the standard way, since the leading 0 does not affect the numerical value. Loading Tour Start \ifnum\ifnum\x=1 1\else\ifnum\x=14 1\else0\fi\fi =1 % <do this> \else <do that> \fi Thus you use 'secondary' conditionals to convert the original problem into a simple TRUE/FALSE situation, where the 'outer' \ifnum is simply testing for 0 or 1. \ifnum only accept one test: \ifnum 1<\thepage<33 will just test if 1<\thepage and consider <33 The \ifnum command denotes the start of an if-then-else control structure. Users. Programmieren in TeX / LaTeX. The following MWE works nicely: \\documentclass{article} \\usepackage{ Missing = inserted for \ifnum. LaTeX Templates Articles, Essays, and Journal Templates Theses, Books, Title pages Letters Presentations and Posters Curricula Vitae / Résumés Assignments, Laboratory books and reports Calendars and Miscellaneous; LaTeX Community Announcements Community talk Comments & Wishes New Members; LaTeX Books LaTeX Beginner's Guide LaTeX Hi. Visit Stack Exchange I think all the answers given so far (including mine above) are not expandable which means that you can't to the test in places like a \write or \edef see the \typeout below. In pgfplotsutil. pdf in the end according to my package specifications. In den Anfängen kommt man zwar mit dem LaTeX Begleiter und dem clsguide. > latex version of \firstoftwoarguments / \secondoftwoarguments :) > You don't even need that, thanks to Donald's solution somewhere in this thread: \let\then\iffalse Weirdness with `\ifnum`: `\ifnum\curyear=2024` gives an error, but `\ifnum2024=\curyear` works as expected Hot Network Questions If someone falsely claims to have a Ph. Use the `\count` command. Häufig wird man bei dem Thema auf das TeXBook verwiesen welches In latex we can use built-in commands to execute code whether the conditions are true or not. 4 ? ! Missing number, treated as zero. While your code can never work for the reasons stated by egreg and David. 14190949656253118000} or \scn{0. For this to work there should be a matching \ifnum 0=`{\fi} following in a macro Learn how to use conditional statements in LaTeX for dynamic document creation. I've read it can be done with \ifnum. In the image I attached, you can see part of the longtable I have. I've tried copying lines 545 to 567 into GEdit to get rid of any unwanted invisible characters, and copied it back to TexMaker, but the errors still show up. tex this happens outside of groups. For the sake of the example, if you had, \if 11<>0 then the test would be true because TeX would compare 1 and the next 1 and would return true. Commented Nov 8, 2023 at 16:50. To use it, @ must be a letter \ifnum\countA=\c Für jedes Sonderzeichen gibt es einen LaTeX-Befehl, der es erzeugt. If a list is missing an element, the `\count` command will return a value that is less than the expected number of elements. 23x10^{-5}$. @Pureferret Use text within \text{} That's what it's for: escaping math mode. For this to work there should be a matching \ifnum 0=`{\fi} following in a macro which is called later on in the process. TeX - LaTeX Meta your communities . Sometimes there are conflicts between some packages but they usually resolve quickly by releasing an update and you might see that there was nothing wrong with your commands. LaTeX is a powerful tool. 0. For example, the previous equation was produced with: % Plus minus symbol in LaTeX \[ x^2+bx+c=0 \implies x=\frac{-b \pm \sqrt{b^2 Solution: If you are using a local LaTeX IDE/Studio, I recommend updating the packages you are using. I would also recommend to not use some \if TT\fi trickery but use a if-macro which accepts the true and false branches as arguments. This is easily achieved and can be extended, if needed, for more complicate issues, An online LaTeX editor that’s easy to use. No installation, real-time collaboration, version control, hundreds of LaTeX {\ifnum 0=`}\fi \hrule \@height \arrayrulewidth \futurelet l. My problem is that in the last column the title and some letters appeared higher or lower than the rest of the text from the longtable. My LaTeX document compiled fine on a Springer Nature template and even on another IEEE template. Note that the number of Curios, your OS is a bit newer than mine (I'm on Open SuSe 42. @user1850133 I added the integer comparison. Here is an \ifnum comparison that can handle non-numeric inputs. 41x10^{-1}$ or $1. So powerful, in fact, that it can be used for much more than document markup. I am using a loop to define keys with the xkeyval package, as well as to actually read out the keys inside some self-defined command. – Stefan Kottwitz ♦. But there are many, many, many other natbib-compatible styles out there (in fact apacite is more the exception than the rule). \fi % Digit-character-token "0" of `\ifnum`'s second TeX-<number>-quantity found, thus the process of % gathering tokens that belong to \ifnum's second TeX-<number>-quantity is still in progress and now % forms a process of gathering more digit-character-tokens or something that terminates the % process of gathering, hereby expanding expandable latex; tikz; pgf; Share. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Ich weiss, dass es sich um einen LaTeX-Counter und ein TeX-Befehl handelt, aber kann ich die beiden irgendwie miteinander verwenden? sowas wie: \documentclass{minimal} \begin{document} \newcounter{X} \setcounter{X}{20} \ifnum\X<10 Counter X ist kleiner 10. Then LaTeX starts to gather \ifnum's second TeX-⟨number⟩-quantity. Package imakeidx tests for \directlua and finds it defined, because it uses eTeX's \ifdefined. The test \if 1<>0 compares 1 and < and yields false, thus you see 1 equals 0. The forms <integer \ifnum is a TeX primitive conditional for comparing integers: \ifnum1=1 true \else \ifnum <integer-1><R><integer-2> <tex-code-1> [\else <tex-code-2>] \fi With values: %A TeX primitive counter: \newcount\countA% \countA=5% %A LaTeX counter: \newcounter{counterB}% \setcounter{counterB}{5}% Lorem ipsum \makeatletter% c@<countername> can access the integer value of the counter. If that doesn't work, type X <return> to quit. Would appreciate any help! (Compiling with Lualatex) I was looking for some hints in the amsmath documentation and found the following trick (adapted, of course): \usepackage{amsmath} \renewcommand{\theequation}{\thechapter--\arabic{equation}} If we look at the original definition of \theequation, we can find that it's more robust than our first attempt: \long macro:->\ifnum \c@chapter >\z@ \thechapter . \fi \fi \fi Posts about ifnum written by Izaak Neutelings. See the explanation there. 46 \DeclareUnicodeCharacter{00A4}{\textcurrency} I was expecting I need something similar to \ifnum \j mod 2 = 0 rest of a number, but do not know how to do this in line 22. A You should think to \thechapter as the representation of the chapter number in some strange radix: a numeric test like 100>20 would give wrong results if the left hand side is in base two and the right hand side in base 10 and you're doing something similar. Interpunktionszeichen [Bearbeiten] Bezeichnung Ausgabe LaTeX-Code Bindestrich (auch Viertelgeviertstrich) - -Halbgeviertstrich – --Geviertstrich — ---Auslassungspunkte \dots: vertikale Auslassungspunkte ⋮ \vdots: Apostroph ’ ' deutsche Anführungszeichen sie sagte „hallo“ sie sagte ,,hallo`` sie @LéoLéopoldHertz준영 -- you must have a package loaded that changes the meaning (to latex) of \&, but since we don't know that that might be, can't guess at an answer. Follow asked Apr 20, 2010 at 15:17. The primitive was introduced in pdfTEX 1. I have a little problem here in my LaTeX code, wich only appears when I put a \begin{center} & \end{center}, that gives me this error: Code: Select all . To demonstrate the general-purpose programming abilities of LaTeX, we’ll look at an example that calculates the first Fibonacci numbers. If you need math symbols within again, write \text{word $\symbol$} or even better, end the macro argument, such as \text{word } \symbol \text{ and more text}. Follow edited Aug 20, 2013 at 20:32. Modified 8 years, 11 months ago. However, it is not clear whether you need the updated values of \M and \N to carry through to each successive loop iteration. Stack Exchange Network. ChapterName in the header is expected since no chapter counter has been incremented. – Skillmon If you change the \lets in the first branch of the \ifnum to \xdef\M{1}\xdef\N{\i}, you can get it to compile. So what you want to test is the "abstract" value of the counter: \renewcommand{\chaptermark}[1]{% As shown by egreg on this thread, using the \ifstrempty command from the etoolbox package, it's possible to test if the given string is empty or not, with the added bonus that linebreaks in the given string won't cause problems. (This works as TeX keeps expanding until it finds a number when considering the outer \ifnum. tex:38: LaTeX Error: Something's wrong--perhaps a missing \item. One other place this is used is in \hline. Wir listen Ihnen alle Befehle dafür auf. Therefore \pgfresult is not 1 or 0 anymore and \ifnum cannot be used. Under pdfTeX you can perform string comparisons using \pdfstrcmp{<strA>}{<strB>}. In this case you can just add the \ifnum stuff to the node contents to make TikZ happy. Jobs \ifnum compares two integers so you must ensure that the numbers are really integers. Hereby the space-character behind the 1 also is tokenized as an explicit space-token. \ else Needs improvement. Abhi Abhi. I'd like the proof cases to reorder themselves automatically when I reorder You can use \@ifnextchar{<char>}{<true>}{<false>} to check if the next character (actually next token) is -. From totcount. 12 \hline My code is this: \documentcl Skip to main content. Instead, you must nest your conditionals: \newcount\X \X=10 \newif\ifGEzero \loop \the\X\endgraf \advance \X by -1 % The spaces after the 0's are important \ifnum\X>0 \GEzerotrue \else \ifnum\X=0 \GEzerotrue \else\GEzerofalse \fi \fi \ifGEzero \repeat \bye I have some numbers output from Matlab and I want to show them as tables in LaTeX. They always Open this LaTeX fragment in Overleaf. on the jacket of a book and they profit from that claim, is that criminal fraud? As the closing \fi is following directly thereafter the whole thing \ifnum\z@=`}\fi expands to nothing independent on the actually number value. An online LaTeX editor that’s easy to use. I appear to be able to return through the messages and I get a properly formatted . But again the character-token 1 is taken for an element/the first element that belongs to a sequence of character-tokens from the set {1,2,3,4,5,6,7,8,9,0}. The above example produces the following output: \[ F = G \left( \frac{m_1 m_2}{r^2} \right) \] Notice that to insert the parentheses or brackets, the \left and \right commands are used. \fi \@arabic I'm trying to use expl3 sequences in order to stored 0, 1 or more affiliations to 1 or more authors stored in a datatool database. 9k 37 37 gold badges 93 93 silver badges 300 300 bronze badges. Improve this question. pgfplots uses library fpu for better precision by default, which has a different internal number format. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their TeX - LaTeX Meta your communities . If #1 is not a number, then the \ifnum argument expansion stops after the 0 with a false comparison (having already printed out #1), and then Misplaced \noalign. Even if you are using only one bracket, both commands are mandatory. Given your \sqrt example that probably doesn't matter, but the following is a version using expandable tests that is almost certainly the quickest version posted so far, although rather expensive in terms of \if compares two tokens, independently of what they mean. /trabli. Sie möchten Sonderzeichen oder reservierte Zeichen in LaTeX eingeben? Für die gängisten Sonderzeichen lesen Sie unseren Beitrag. – David Carlisle. Log in; Sign up; Home. Below are my files and the results I get. Graphics with TikZ in LaTeX Raw TeX does not have amenities such as compound Boolean operators. 01234e-3} and results in $1. like this: \noexpand{\ifnum1>0}% hello1 \else world1 % next three lines cause trouble (nested ifnum) \MACROB hello2 \fi \fi Now \noexpand "tells" TeX not to expand the subsequent token if that is In order to set entries of a table in math mode, you need array. \left and \right can dynamically adjust the size, as shown by the next example: Mit LaTeX lassen sich eine Vielzahl mathematischer Zeichen und Symbole einfügen. since you're not the person who asked this question, please post a new one, with a compilable example that demonstrates the problem. Mensch. You could use the standard natbib styles for starters: \bibliographystyle{plainnat} or \bibliographystyle{unsrtnat}. \documentclass{article} \usepackage{tikz} \usepackage[active,tightpage] LaTeX help chat. Use \totvalue instead, it maps the name to the internal counter register that can be used with \ifnum. code. Eine umfassende Dokumentation zur Programmierung von LaTeX Klassen und Paketen gibt es leider nicht. D. more stack exchange communities TeX - LaTeX help chat. It is possible to implement it approximately with a TeX macro using a cleverly chosen parameter text (see one of the following: The TeXbook chapter 20, TexbyTopic 11. Of course I cannot tell you which are appropriate for submission for your journal. Share. What you can do is using an advanced feature of many text editors called regular expressions to search and replace all numbers in your Frontmatter in a document is typically associated with an Abstract, ToC, LoF, LoT, Preface, etc. Thank you so much. . 01234e-3 and I want to show them in scientific notation. sty: %% Returns the numeric total value of a registered Don't load algorithm2e when you're using algpseudocode. How can I find/write, a macro that is called like \scn{0. Alternatively, you may try using an online LaTeX editor. am working on overleaf is there any aux fule generated by overleaf? i cant see sorry for stupid question as i am new to latex – user12. That's nothing to do with latex, just basic arithmetic. Missing = inserted for \ifnum [closed] Ask Question Asked 9 years, 2 months ago. pyerre wjqfyr sbluwp rcfwpm apipdrk hpu xcbiza ham ajhcd vfdexz