Hello, Gofinity

Every Go program starts the same way: a package declaration, some imports, and functions. Executable programs live in package main and start at func main.

Your job is to fill in Greet, which takes a name and returns a greeting.

Task

Implement Greet(name string) string in main.go so that it returns:

Hello, <name>!

For example, Greet("Gofinity") must return Hello, Gofinity!.

If name is empty, greet the world instead — Greet("") must return Hello, World!.

Hints

• fmt.Sprintf formats a string and returns it, rather than printing it: fmt.Sprintf("Hello, %s!", name).
• A string compares to the empty string with ==, and len(name) == 0 works just as well.
• Run the tests with the Run button. main_test.go is read-only — the same tests run when you submit.