# [Tex/LaTex] Align Input and Output of algorithm to left

algorithmicalgorithmsalign

I use the following template for KDD 2017 – for conference (sample-sigconf file): here.
This is the code I use for the my algorithm:

\documentclass[sigconf]{acmart}
\usepackage{booktabs,makecell,tabularx}

\newcolumntype{L}{>{\raggedright\arraybackslash}X}
\usepackage{siunitx}
\usepackage{array,booktabs}

\usepackage{graphicx}
\usepackage{epstopdf}

%\newcolumntype{C}[1]{>{\centering\arraybackslash}p{#1}}
\usepackage{algorithm}% http://ctan.org/pkg/algorithms
\usepackage{algpseudocode}% http://ctan.org/pkg/algorithmicx
\usepackage{amsmath}

\begin{algorithm} [H]
\caption{Dsfdgfgskj sdfgfkjsdl sdfggjlkj fgsdt}
\label{alg:ALG1}
\textbf{INPUT:} $x$ - decision tree\\
\textbf{OUTPUT:} $abc$ is $x$ in Txx Bxxxxx Gxxxx
\begin{algorithmic}
\State  Function $UpdateNodes(x)$:

\If {  $wrejkwe$ ($rw$) trwer tewwerl }
%       \COMMENT {
\State {jklrjkljfgkljlkj  kjkldfj gfdsdf }
\State  Set fdgsdsd
\ForAll  {$j=1$ to $N (x)$}
\State        Call fgsd(x)\State Set sfgdfgd =sfdg + fgds \EndFor \EndIf \end{algorithmic} \end{algorithm}  However, the input and output are aligned to center. How can I change it to be aligned to left? #### Best Answer Use the commands of package algpseudocode to define input, output, and function heading. The predefined commands \Require and \Ensure are intended for describing the in- and output. If you don't like the keywords Require and Ensure, redefine them: \usepackage{algpseudocode} \algrenewcommand\algorithmicrequire{\textbf{Input:}} \algrenewcommand\algorithmicensure{\textbf{Output:}}  You can also define new statements \Input and \Output: \algnewcommand\algorithmicinput{\textbf{Input:}} \algnewcommand\algorithmicoutput{\textbf{Output:}} \algnewcommand\Input{\item[\algorithmicinput]}% \algnewcommand\Output{\item[\algorithmicoutput]}%  Now you can use \Input ...description of input and likewise \Output .... For the function heading, use  \Function {UpdateNodes}{x$} ... \EndFunction  \documentclass[sigconf]{acmart} \usepackage{algorithm}% http://ctan.org/pkg/algorithms \usepackage{algpseudocode}% http://ctan.org/pkg/algorithmicx \algrenewcommand\algorithmicrequire{\textbf{Input:}} \algrenewcommand\algorithmicensure{\textbf{Output:}} \begin{document} \begin{algorithm} \caption{Dsfdgfgskj sdfgfkjsdl sdfggjlkj fgsdt} \label{alg:ALG1} \begin{algorithmic} \Require$x$- decision tree \Ensure$abc$is$x$in Txx Bxxxxx Gxxxx \Function {UpdateNodes}{$x$} \If {$wrejkwe$($rw$) trwer tewwerl } % \COMMENT { \State {jklrjkljfgkljlkj kjkldfj gfdsdf } \State Set fdgsdsd \ForAll {$j=1$to$N (x)$} \State Call$fgsd(x)$\State Set$sfgdfgd =sfdg + fgds \$

\EndFor
\EndIf
\EndFunction
\end{algorithmic}
\end{algorithm}
\end{document}