Explain in simple terms: Revealing the secret of Go language without semicolon

Question: Why doesn’t the Go language use semicolons? Answer: The Go language uses end-of-line newlines to separate statements, which simplifies the syntax, eliminates unnecessary symbols, and improves code readability. Semicolons are used in special cases: Empty statements: Lines that do not contain valid code need to be terminated with a semicolon. Multiple statement lines: Use semicolons to separate multiple statements on the same line.

In-depth explanation: Revealing the secret of Go language without semicolon

Preface

Go language is a unique programming language that abandons the common statement separator "semicolon" in traditional languages. This can sometimes be confusing for new Go developers, so this article will explain the semicolon-free syntax of the Go language in a simple and easy-to-understand manner, and provide a practical case for your reference.

Semicolon-free syntax of Go language

The Go language uses end-of-line newlines to separate statements. Therefore, the end of a statement does not require a semicolon. This makes Go code concise and readable because it eliminates unnecessary syntax symbols.

The following code demonstrates the use of semicolon-free syntax:

package main

import "fmt"

func main() {
    fmt.Println("Hello, world!")
    fmt.Println("Go is awesome!")
}

In this example, statements are separated by newlines and no semicolons are used. The code can still compile and execute correctly, and the output is as follows:

Hello, world!
Go is awesome!

Semicolons in special cases

Although the Go language advocates semicolon-free syntax, there are a few Special case exceptions:

• Empty statement: If a line does not contain any valid code, you need to end it with a semicolon. For example:

func main() {
    ; // 空语句
}

• Multiple statement lines: If a line contains multiple statements, you can use semicolons to separate them. For example:

func main() {
    fmt.Println("Line 1"); fmt.Println("Line 2")
}

Practical case

The following is a simple Go program that demonstrates semicolon-free syntax and semicolon usage in special cases:

package main

import "fmt"

func main() {
    fmt.Println("Hello, world!") // 语句由换行符分隔

    ; // 空语句

    fmt.Println("This is a multi-statement line:"); // 多语句行，使用分号分隔
    fmt.Println(" - First line")
    fmt.Println(" - Second line")
}

When you run this program, it will output:

Hello, world!

This is a multi-statement line:
 - First line
 - Second line

Conclusion

By understanding the semicolon-free syntax of the Go language and the special case of semicolons Usage, you can write concise, readable and efficient Go code. This unique feature makes Go a modern and efficient programming language.

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