> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/fr/questions-et-reponses/66-i-m-trying-to-include-urls-in-my-.tex-or-.bib-but-i-got-an-error-missing-inserted.md).

# J'essaie d'inclure des URL dans mon .tex ou mon .bib, mais j'obtiens l'erreur « Missing $ inserted »

Votre URL contient peut-être quelques caractères de soulignement `_`, qui sont des caractères spéciaux en LaTeX — ils servent d’opérateur d’indice en mode mathématique, par exemple `$x_i$` produira $$x\_i$$. En général, si vous voulez utiliser un caractère de soulignement littéral dans un texte normal, vous devrez l’échapper en l’écrivant comme `\_`.

Heureusement, il existe un moyen plus simple d’inclure des URL avec des caractères de soulignement. Si vous ajoutez `\\usepackage{url}` ou `\\usepackage{hyperref}` juste avant votre `\begin{document}`, vous pouvez alors écrire :

```latex
\url{https://www.example.com/url_with_underscore}
```

dans votre document.

Pour plus de détails, consultez l’article d’aide Overleaf [Il manque un $ inséré](/latex/fr/erreurs-latex/25-missing-inserted.md).


---

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