Error instalar.NET core not Linux Mint

When trying to install .NET Core on Linux Mint using Snap through the Command sudo snap install dotnet-sdk --classic, at the end of the package installation, it displays:

"dotnet-sdk 3.1.401 from Microsoft .NET Core (dotnetcore✓) installed"

Occurs, however, that when I then run the command dotnet -v, the following is displayed:

"command 'dotnet' not found , but can be installed with: sudo snap install dotnet-sdk "

I tried to install using APT-GET also with sudo apt-get install -y dotnet-sdk-3.1 and after all installation is displayed:

Reading package lists... Ready Building dependency tree
Reading status information... Ready E: unable to find package dotnet-sdk-3.1 E: couldn't find any package by glob 'dotnet-sdk-3.1' E: could not find the package through regular expression 'dotnet-sdk-3.1'

I thought the problem could be environment variable, however, searching, I did not find nothing about it.

I followed tutorials aimed at Ubuntu, because Mint is an OS that, like it is also based on Debian. I did not find anything specific to install on this operating system.