space before itemize with enumitem

Question

I'm writing a report in which I describe numerous algorithms in the following way:

"[algorithm name]  
input: [input]  
output: [output]  
- step 1  
...  
- step n"  

My problem is that I'm also using the enumitem package to reduce the spacing between items and it adds an unwanted space between the output line and the beginning of the itemize.

\documentclass[a4paper,11pt]{article}  
\usepackage[shortlabels]{enumitem}  

\setlist[itemize]{noitemsep} 

\begin{document}  

algorithm name  
\textsc{input:} input  
\textsc{output:} output  
\begin{itemize}  
\item step 1  
\item step 2  
\item step 3  
\end{itemize}  
\end{document}

I tried making the first two lines part of the itemize by putting "input" and "output" as \item labels, but the difference in length makes them "right-aligned" (relatively to each other) and outside the body box.

Answer 1

Use nosep:

\documentclass[a4paper,11pt]{article}
\usepackage[shortlabels]{enumitem}

\begin{document}

algorithm name\\
\textsc{input:} input\\
\textsc{output:} output
\begin{itemize}[nosep]
\item step 1
\item step 2
\item step 3
\end{itemize}

\end{document}