Goland running a simple Hello World Example
Answered
I have a working directory Golang with a file hello.go. There is an error message that I cannot make go away.
I just want to do a go run hello.go as I can do from the terminal.
When I click on the working directory, none of my files show up in the dropdown. Just the triangle symbol on the dropdown changes direction and that's all.

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Could you please navigate to File | Settings | Editor | File Types, find Text or Auto-detect file type by content, and exclude hello.go from the File name patterns list? Does it help? If not, please, provide a screenshot of your project tree inside the IDE.