Exam Class, "solution" not displaying

Question

I've been trying to use the below code and anything inside the solution block doesn't show up. Any idea why?

\documentclass{exam}
\usepackage[utf8]{inputenc}
\usepackage{hyperref}
\usepackage{amsthm}

\begin{document}
\begin{questions}{}
\question test q?
\begin{solution}
    test ans
\end{solution}
\end{questions}
\end{document}

Answer 1

You need to indicate that you want to print the answers, e.g. by adding the answers key when loading the class, e.g. \documentclass[answers]{exam}.

\documentclass[answers]{exam}
\usepackage[utf8]{inputenc}
\usepackage{hyperref}
\usepackage{amsthm}

\begin{document}
\begin{questions}{}
\question test q?
\begin{solution}
    test ans
\end{solution}
\end{questions}
\end{document}

There are alternatives, you can also just say \printanswers.