\usepackage{gensymb} to your preamble, that should enable the command. Another alternative is the\textdegreecommand, which is provided by thetextcomppackage. And, finally,$^{\circ}$is another way of obtaining roughly the right symbol.
For example, in this case, to use the\iintsymbol you need to make sure you have\usepackage{amsmath}in your document preamble, i.e. before the\begin{document}statement. To see the packages Overleaf supports, readWhat packages do you support?
If you open the code above in Overleaf then switch to Visual Editor you’ll see the caption dropdown is greyed out (disabled): How to add borders to table cells At the moment,Visual Editorprovides basic support for borders, accessible from the borders drop-down menu which currently has two...
For example, in this case, to use the\iintsymbol you need to make sure you have\usepackage{amsmath}in your document preamble, i.e. before the\begin{document}statement. To see the packages Overleaf supports, readWhat packages do you support?
For example, in this case, to use the\iintsymbol you need to make sure you have\usepackage{amsmath}in your document preamble, i.e. before the\begin{document}statement. To see the packages Overleaf supports, readWhat packages do you support?
For example, in this case, to use the\iintsymbol you need to make sure you have\usepackage{amsmath}in your document preamble, i.e. before the\begin{document}statement. To see the packages Overleaf supports, readWhat packages do you support?