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To master the key points of Go language application development, you need specific code examples
As an efficient, concise and concurrency-rich programming language, Go language is becoming more and more popular. Favored by developers. Mastering the key points of Go language application development can help developers better use this language to develop efficient and stable applications. This article will introduce several key points and give specific code examples.
package main import "fmt" func fib(n int, c chan int) { x, y := 0, 1 for i := 0; i < n; i++ { c <- x x, y = y, x+y } close(c) } func main() { c := make(chan int) go fib(10, c) for i := range c { fmt.Println(i) } }
In this example, we define a fib function to calculate the Fibonacci sequence and use The goroutine starts this function. In the main function, channel c is traversed through range to implement concurrent calculation and output the first 10 items of the Fibonacci sequence.
package main import ( "errors" "fmt" ) func divide(a, b float64) (float64, error) { if b == 0 { return 0, errors.New("division by zero") } return a / b, nil } func main() { result, err := divide(10, 2) if err != nil { fmt.Println("Error:", err) } else { fmt.Println("Result:", result) } result, err = divide(10, 0) if err != nil { fmt.Println("Error:", err) } else { fmt.Println("Result:", result) } }
In this example, the divide function is used to implement the division operation of two floating point numbers and returns an error when the divisor is 0. Call the divide function respectively in the main function and handle it by judging the error.
package main import ( "fmt" "time" ) func main() { now := time.Now() fmt.Printf("Current time: %s ", now.Format("2006-01-02 15:04:05")) }
In this example, we introduce the time package and obtain the current time through the time.Now() method, and then Format the time and output it through the Format method.
Summary
Through the above three specific code examples, we can see the key points of mastering Go language application development: concurrent programming, error handling, and the use of built-in packages. These contents are essential points when developing Go applications. We hope to help readers better understand and apply the Go language for program development.
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