Latex nested loop not displaying correctly

Question

Hi I'm new to latex I use here the Algorithmic package to write my pseudo code the problem I faced is that 'some text' is displayed correctly under the second loop but the 'return' statement which needs to be outside the first for loop isn't showing correctly also it does not mark the end of each loop (the vertical tic is missing), the execution result is shown in the image:

\documentclass{article}
\usepackage[utf8,linesnumbered,ruled,vlined]{algorithm2e}
\usepackage {algpseudocode}
\usepackage{algorithmicx}
\usepackage{algcompatible}

\begin{document}
\begin{algorithm}
\ContinuedFloat

\caption{My algorithm}
\textbf{Input:} solution,bound, data\_matrix, vehicle\_capacity, demand\_data,k\_max,operations\_data, move\_type,tenure, max\_number\_of\_moves,max\_iter,non\_improvement\_maxiter,itermax,epsilon\
\textbf{Output:} $best$ $solution$ \[0.1in]

routes = extract routes from \textbf{solution}\
oldfitness = fitness(\textbf{solution})\

ls\_move\_type = inversion\
best\_solution = routes\[0.1in]

\For{0 \leq i \leq itermax}{
    new\_routes = [ ]\
    desc = 'normal route'\
    
    
    \For{route \textbf{in} routes}{
        n=length(route)\
        comb = int($\frac{n!}{(n-2)!}$)\
        \If{n \geq 4}{
            tabu\_list\_tenure = $\frac{comb}{5}$\
            ls\_maxiteration = 50 \
            ls\_move\_type = 'inversion'\
        }
        \If{3 \leq n \leq 4}{
            tabu\_list_tenure = $\frac{comb}{4}$ \
            ls\_maxiteration = 25\
            ls\_move\_type = 'relocation'\
        }
       \Else{
         append \textbf{route} to \textbf{new\_routes}\
         desc = 'short route'\
        }\[0.1in]
        }
        
        
    some action
    
        
        
        
    }



return






\end{algorithm}

\end{document}

user_2777074 · Answer

There is no point in wondering about the output as long as you get errors in your .log file. After an error, latex only recovers enough to syntax check the rest of the document, not necessarily producing sensible output.

Some of the most critical problems:

never ignore error messages!
utf8 isn't a valid option for the algorithm2e package
\ContinuedFloat is not defined by default. If you want to use it, you need a package which defines it. Maybe you want to use the caption package?
never ever use math mode to fake italic text as in $best$ $solution$. This completely messes up the kerning
some of your _ are not escaped
you mustn't use math commands like 0 \leq i \leq outside of math mode
use something like \Return to properly format it
using \ for line breaks is already quite questionable, but using them two times in a row is simply an error.
because one can't say it often enough: never ignore error messages!

\documentclass{article}
\usepackage[
%utf8,
linesnumbered,ruled,vlined]{algorithm2e}
\usepackage {algpseudocode}
\usepackage{algorithmicx}
\usepackage{algcompatible}


\begin{document}
\begin{algorithm}
%\ContinuedFloat
\caption{My algorithm}
	extbf{Input:} solution,bound, data\_matrix, vehicle\_capacity, demand\_data,k\_max,operations\_data, move\_type,tenure, max\_number\_of\_moves,max\_iter,non\_improvement\_maxiter,itermax,epsilon

	extbf{Output:} \emph{best solution}

\medskip

routes = extract routes from 	extbf{solution}

oldfitness = fitness(	extbf{solution})

ls\_move\_type = inversion

best\_solution = routes

\medskip

\For{$0 \leq i \leq$ itermax}{
    new\_routes = [ ]
    
    desc = 'normal route'
    
    \For{route 	extbf{in} routes}{
        n=length(route)
        
        comb = int($\frac{n!}{(n-2)!}$)
        
        \If{$n \geq 4$}{
            tabu\_list\_tenure = $\frac{comb}{5}$
            
            ls\_maxiteration = 50 
            
            ls\_move\_type = 'inversion'
        }
        \If{$3 \leq n \leq 4$}{
            tabu\_list\_tenure = $\frac{comb}{4}$
            
            ls\_maxiteration = 25
            
            ls\_move\_type = 'relocation'
        }
       \Else{
         append 	extbf{route} to 	extbf{new\_routes}
         
         desc = 'short route'         
        }
        
        \medskip
        
        }
    some action   
    }
\Return
\end{algorithm}

\end{document}

Latex nested loop not displaying correctly

1 Answers