Here's what you learned in this section:
Go was created at Google for fast compilation and simple concurrency
Every Go program needs package main and func main()
Use import to bring in packages like fmt
go run compiles and runs. go build creates an executable
gofmt and go fmt automatically format your code
go mod init creates a new module with a go.mod file
Uppercase names are exported. Lowercase names are private
go vet catches common mistakes before runtime