The symbol **zeta** is a letter of the Greek alphabet. This symbol is commonly used in mathematics and physics.

You don’t need any package to print this symbol in a LaTeX document, you just need to use LaTeX’s default `\zeta`

command.

Symbol/Unicode | Zeta/U+03B6 |
---|---|

Type of symbol | Greek small letter |

Package (requirement) | No |

Argument | No |

Latex command | `\zeta` |

Example | `\zeta` → ζ |

Below are some examples of how this symbol is used in LaTeX.

```
\documentclass{article}
\begin{document}
\[ \zeta(2)=\frac{\pi^2}{6} \]
\[ \zeta(s)=\sum^\infty_{n=1}\frac{1}{n^s} \]
\[ \frac{1}{\zeta(s)} \]
\end{document}
```

**Output :**

## Zeta symbol using upgreek package

There is another way to print Zeta symbols on latex. For this, you need to use a package which is **upgreek**. This package provides a `\upzeta`

command that you can use to print this symbol to a LaTeX document.

But in this case, the output will be slightly different. let’s see

```
\documentclass{article}
\usepackage{upgreek}
\begin{document}
\[ \verb|\zeta|\rightarrow \zeta \quad \verb|\upzeta|\rightarrow \upzeta \]
\[ \upzeta(2)=\frac{\pi^2}{6} \]
\[ \upzeta(s)=\sum^\infty_{n=1}\frac{1}{n^s} \]
\[ \frac{1}{\upzeta(s)} \]
\end{document}
```

**Output :**