Solved: \mathbb{Z} yields undefined control sequence error

Whenever I work with the \mathbb{Z} command, I get this \mathbb{Z} yields undefined control sequence error.

In this article, I will show you how to fix it. It is a small mistake.

Solution 1: Use amssymb package

Load amssymb with \usepackage{amssymb}

\documentclass{article}
\usepackage{amssymb}
\begin{document}
$\mathbb{Z}$
\end{document}

Solution 2: Use amsfonts package

Or load amsfonts with \usepackage{amsfonts}

\documentclass{article}
\usepackage{amsfonts}
\begin{document}
$\mathbb{Z}$
\end{document}

I think it is solved now!