Get NuGet.exe version from command-line
Typing nuget help
from the command line will in addition to the expected help information also list the current NuGet.exe version.
To know which version of NuGet is installed use follow steps
In Visual Studio, use the Help > About Microsoft Visual Studio command and look at the version displayed next to NuGet Package Manager.
Alternatively, launch the Package Manager Console (Tools > NuGet Package Manager > Package Manager Console) and enter
$host
to see information about NuGet including the version.