Explore the keyword treasure trove of Go language

Understanding the keywords of the Go language is crucial to writing effective code, including: Basic keywords: var, func, type Control flow keywords: for, if Type checking keywords: var, if Error handling keywords: if Concurrency keywords: go, wg Practical case: Use the range and defer keywords to traverse the collection and ensure that specific code blocks are executed.

Explore the keyword treasure trove of Go language

As a statically typed language, Go language has a rich set of keywords , these keywords define the syntax and semantics of the language. A deep understanding of these keywords is crucial to writing Go code effectively.

1. Basic keywords

The Go language contains a series of basic keywords for defining variables, functions and data structures:

var name string
func main() {
    fmt.Println("Hello, world!")
}
type Person struct {
    Name string
}

2. Control flow keywords

These keywords are used to control the execution flow of the code:

for i := 0; i < 10; i++ {}
if age > 18 {
    fmt.Println("Adult")
}

3. Type checking and conversion keywords

These keywords are used to check and convert the type of variables:

var value interface{}
if value, ok := value.(int); ok {
    fmt.Println(value)
}

4. Error handling keywords

These keywords are used to handle errors:

if err != nil {
    fmt.Println(err)
    return
}

5. Concurrency keywords

These keywords are used to write concurrent code:

var wg sync.WaitGroup
go func() {
    fmt.Println("Hello")
    wg.Done()
}()
wg.Wait()

Practical case: use The range and defer

range keywords are used to traverse the collection, and the defer keyword is used to ensure that when the function exits Before executing a specific block of code:

var slice = []int{1, 2, 3}

for _, value := range slice {
    fmt.Println(value)
}

defer func() {
    fmt.Println("Done")
}()

Output:

1
2
3
Done

By using the range keyword on slice we can easily iterate through it and print it for each value. defer Keyword ensures "Done" is printed after the function exits.

Understanding the keywords of the Go language is crucial to writing clear, concise, and efficient code. By mastering these keywords, developers can unleash the full potential of the Go language.

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