68 lines
2.1 KiB
Markdown
68 lines
2.1 KiB
Markdown
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## Why do you need to use comments sometimes?
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1. To combine different expressions together
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2. To provide explanations or generating automatic documentation for your code *CORRECT*
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3. To make the code look nice and beautiful
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## Which of the following code is correct?
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1.
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```go
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package main
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/ main function is an entry point /
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func main() {
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fmt.Println("Hi")
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}
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```
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2. *CORRECT*
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```go
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package main
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// main function is an entry point /*
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func main() {
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fmt.Println(/* this will print Hi! */ "Hi")
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}
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```
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3.
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```go
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package main
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/*
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main function is an entry point
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It allows Go to find where to start executing an executable program.
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*/
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func main() {
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fmt.Println(// "this will print Hi!")
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}
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```
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> 1. `/` is not a comment. It should be `//`.
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> 2. Multiline comments can be put almost anywhere. However, when a comment starts with `/*`, it also needs to end with `*/`. Here, Go doesn't interpret `/* ... */`, it just skips it. And, when Go sees `//` as the first two characters in a code, it skips the whole line.
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> 3. `//` prevents Go to interpret the rest of the code line. That's why this code doesn't work. Go can't interpret this part because of the comment: `"this will print Hi!")`
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## How should you name your code so that Go can generate documentation from your code automatically?
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1. By commenting the each line of the code; then it will generate the documentation from whatever it sees
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2. By starting the comments using the name of the declared names *CORRECT*
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3. By using multi-line comments
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> 1. This won't help. Sorry.
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> 3. It doesn't matter whether you type your comments using single-line comments or multi-line comments.
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## Which tool do you need to use from the command-line to print the documentation?
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1. go build
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2. go run
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3. go doctor
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4. go doc
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## What's the difference between `godoc` and `go doc`?
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1. `go doc` is the real tool behind `godoc`
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2. `godoc` is the real tool behind `go doc` *CORRECT*
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3. `go` tool is the real tool behind `go doc`
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4. `go` tool is the real tool behind `godoc`
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> 2. That's right. go doc tool uses godoc tool behind the scenes. go doc is just a simplified version of the godoc tool.
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