golang handles escape characters

In daily programming, we often use strings and escape characters. Escape characters are characters used to express special meanings, such as line feed (
), tab ( ), and carriage return ( ). In Golang, handling escape characters can be achieved by using backslash () plus specific characters.

1. Use of escape characters

In Golang, escape characters can be used in strings and character constants. We can use escape characters by inserting backslashes in strings or character constants. For example:

fmt.Println("Hello
World")
fmt.Println(''')

Output:

Hello
World
'

As you can see, the first line outputs a newline character, and the second line outputs a single quote character.

In Golang, the commonly used escape characters are as shown in the following table:

Escape characters	Meaning
\	Backslash
\'	Single quote
\"	Double quotes
Line break
	Carriage return character
	Tab character
	Backspace character
	Form feed character

2. Handling backslashes

When using Golang to handle escape characters, we need to pay attention to the usage of backslashes.

Because backslashes are used to escape characters, we need to use two A backslash represents a backslash character. For example:

fmt.Println("\")

Output:

As you can see, a backslash character is output.

3. Using Raw string

In Golang, we can also use Raw string to handle escape characters. Raw strings are enclosed in backtick marks (`), and the effect of escape characters can be ignored. For example:

fmt.Println(`Hello
World`)
fmt.Println(`'`)

Output:

Hello
World
'

You can see that the output string is not escaped.

The usage scenario of Raw string is mainly when large paragraphs need to be input Text, such as multi-line SQL, HTML or JSON formatted text.

4. Use strconv.Unquote to parse escape characters

In Golang, we can also Use the strconv.Unquote function to parse strings containing escaped characters. For example:

s, _ := strconv.Unquote(`"Hello
World"`)
fmt.Println(s)

Output:

Hello
World

As you can see, in the output string,
is escaped to Newline character.

It should be noted that if the parsed string is not wrapped in double quotes or contains illegal escape characters, an error will be returned.

5. Summary

Golang provides a variety of ways to handle escape characters, including using backslash, Raw string, strconv.Unquote and other methods. In actual applications, we can choose the appropriate method according to specific scenarios. processing method to complete the processing of escape characters.

The above is the detailed content of golang handles escape characters. For more information, please follow other related articles on the PHP Chinese website!