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ru/02.8.md

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+# 2.8 Summary
+
+In this chapter, we mainly introduced the 25 Go keywords. Let's review what they are and what they do.
+
+	break    default      func    interface    select
+	case     defer        go      map          struct
+	chan     else         goto    package      switch
+	const    fallthrough  if      range        type
+	continue for          import  return       var
+	
+- `var` and `const` are used to define variables and constants.
+- `package` and `import` are for package use.
+- `func` is used to define functions and methods.
+- `return` is used to return values in functions or methods.
+- `defer` is used to define defer functions.
+- `go` is used to start a new goroutine.
+- `select` is used to switch over multiple channels for communication.
+- `interface` is used to define interfaces.
+- `struct` is used to define special customized types.
+- `break`, `case`, `continue`, `for`, `fallthrough`, `else`, `if`, `switch`, `goto` and `default` were introduced in section 2.3.
+- `chan` is the type of channel for communication among goroutines.
+- `type` is used to define customized types.
+- `map` is used to define map which is similar to hash tables in other languages.
+- `range` is used for reading data from `slice`, `map` and `channel`.
+
+If you understand how to use these 25 keywords, you've learned a lot of Go already.
+
+## Links
+
+- [Directory](preface.md)
+- Previous section: [Concurrency](02.7.md)
+- Next chapter: [Web foundation](03.0.md)