If I have pseudocode as shown below using the algorithm and algorithmic packages, is it possible to indent the pseudocode, including the line numbers, so that it lines up with the indentation of the first line of the paragraph above, i.e. so that the line numbers of the pseudocode are indented as much as the first line of the paragraph above.
This is one possible solution via adjustwidth environment from changepage package. It takes two arguments.
As to the par indention value, please check HERE
\begin{adjustwidth}{left indent}{right indent}
\begin{algorithmic}[1]
content
\end{algorithmic}
\end{adjustwidth}
Code
\documentclass[12,a4paper]{article}
\usepackage[showframe,papersize={\paperwidth,8cm}]{geometry}
\pagestyle{empty}
\usepackage{algorithmic}
\usepackage[plain]{algorithm}
%\usepackage{algpseudocode}
\usepackage{changepage} %adjustwidth environment from changepage package
\begin{document}
Paragraph text, Paragraph text, Paragraph text, Paragraph text, Paragraph text, Paragraph text, Paragraph text, Paragraph text,
\begin{algorithm}
\begin{adjustwidth}{1em}{}
\begin{algorithmic}[1]
\STATE{\textit{pollingDateTime $\leftarrow$ now $-$ 1 hour}}
\FOR {\textbf{each} rssFeed}
\STATE {\textit{pollingDateTime $\leftarrow$ now $-$ 1 hour}}
\ENDFOR
\IF {\textit{pollingDateTime is even}}
\STATE {\textit{pollingDateTime $\leftarrow$ now $-$ 1 hour}}
\ENDIF
\end{algorithmic}
\caption{Algorithm 1}\label{alg1}
\end{adjustwidth}
\end{algorithm}
\end{document}
\documentclass{...}and ending with\end{document}.