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I am trying to write a nested if pseudo code on latex put the following error is appearing:

LaTeX Error: Command \NOT already defined.

\begin{algorithm}[!htbp]
\begin{algorithmic}
\STATE \textbf{Step 5}: Compare each sentence Scores and CFs to determine the class it belong to:
\begin{ALC@g}
\IF {(FR\_Score[sentence] $>$ NFR\_Score[sentence])} 
\STATE Class[Sentence] = FR  
\ELSIF{(FR\_Score[sentence] $<$ NFR\_Score[sentence]) }
\STATE Class [Sentence] = NFR 
\ELSIF {(FR\_Score[sentence] == NFR\_Score[sentence])} 
\begin{ALC@g}
\IF{(FR\_CF[sentence] $>$ NFR\_CF[sentence])} 

\STATE Class[Sentence] = FR  

\ELSIF {(FR\_CF[sentence] $<$ NFR\_CF[sentence])} 

\STATE Class[Sentence] = NFR  

\ELSIF {(FR\_CF[sentence]  == NFR\_CF[sentence])} 

\STATE Class [Sentence] = Nan
\end{ALC@g}
\end{ALC@g}
\end{algorithmic}
\end{algorithm}

update after removing \begin{ALC@g} ..\end{ALC@g} from the code and adding \ENDIF the problem is solved but a 0= symbol is steel appear at the end of the algorithm enter image description here

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  • Why are you using \begin{ALG@g} and \end{ALG@g}? I told you not to. Commented Jul 13, 2022 at 22:09
  • because without using it here latex doesn't give me the required alignment. in the other parts of the code I removed it there's no problem. but here because if and if else statement doesn't work well I don't remove it Commented Jul 13, 2022 at 22:17
  • See answer (and in the previous question of yours I removed those bits and added \ENDIF). Commented Jul 13, 2022 at 22:19

1 Answer 1

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I'm wondering where you found \begin{ALC@g} and \end{ALC@g} documented. You want to close the \IF statements with \ENDIF.

\documentclass{article}
\usepackage{algorithm,algorithmic}

\begin{document}

\begin{algorithm}[!htbp]
\begin{algorithmic}
\STATE \textbf{Step 5}: Compare each sentence Scores and CFs to determine the class it belong to:
\IF {(FR\_Score[sentence] $>$ NFR\_Score[sentence])} 
  \STATE Class[Sentence] = FR  
\ELSIF{(FR\_Score[sentence] $<$ NFR\_Score[sentence]) }
  \STATE Class [Sentence] = NFR 
\ELSIF {(FR\_Score[sentence] == NFR\_Score[sentence])} 
  \IF{(FR\_CF[sentence] $>$ NFR\_CF[sentence])} 
    \STATE Class[Sentence] = FR  
  \ELSIF {(FR\_CF[sentence] $<$ NFR\_CF[sentence])} 
    \STATE Class[Sentence] = NFR  
  \ELSIF {(FR\_CF[sentence]  == NFR\_CF[sentence])} 
    \STATE Class [Sentence] = Nan
  \ENDIF
\ENDIF
\end{algorithmic}
\end{algorithm}

\end{document}

enter image description here

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3
  • Thanks @egreg ! sorry for bothering you. could you see the update, please Commented Jul 13, 2022 at 22:30
  • @Eng.sh Do you see =0 in my image? No. So, please, add a complete (but minimal) document, from \documentclass to \end{document} that shows the issue. Commented Jul 13, 2022 at 22:33
  • Finally solved the problem. I am just remove \usepackage{algpseudocode} from the code. Thank you very much @egreg Commented Jul 13, 2022 at 22:40

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