escape characters javascript

In JavaScript programming, it is often necessary to use some special characters to express some special meanings or symbols. These characters are called escape characters. This article will detail the commonly used escape characters in JavaScript and how to use them correctly.

# represents the newline character, used to break newlines in a string.

For example:

console.log("Hello
World!");

The output result is:

Hello
World!

2. 代表制表符，用于在字符串中插入一个制表位。
   

For example:

console.log("Firstname    Lastname");

The output result For:

Firstname    Lastname

3. "

" represents double quotes, used to express double quotes in strings.

For example:

console.log("She said, "Hello!"");

The output result is:

She said, "Hello!"

4. '

' represents a single quote, used in a string Represents a single quote.

For example:

console.log('He said, 'What's up?'');

The output result is:

He said, 'What's up?'

5. \

\ represents a backslash, used in strings Medium represents a backslash.

For example:

console.log("C:\Program Files\Java\jdk1.8.0_221\bin");

The output result is:

C:Program FilesJavajdk1.8.0_221in

It should be noted that in a double-quoted string, if the backslash is not followed by a special character, then Backslashes are ignored. For example:

console.log("C:Program FilesJavajdk1.8.0_221in");

The output result is:

C:Program FilesJavajdk1.8.0_221bin

At this time, the backslash will be ignored, and the output result is not what we want.

represents the backspace character, which is used to delete the previous character in the string.

For example:

console.log("HelloWorld");

The output result is:

HellWorld

It should be noted that the backspace character only deletes the previous characters and does not output anything on the screen.

# represents the carriage return character, which is used to move the cursor to the beginning of the line.

For example:

console.log("HelloWorld");

The output result is:

World

It should be noted that the carriage return character only moves the cursor to the beginning of the line and does not delete any content. In the output result, the character "Hello" is moved to the beginning of the line by the cursor and is covered by the character "World".

Summary:

This article introduces in detail the commonly used escape characters in JavaScript, as well as the role and usage of each escape character. When writing JavaScript programs, the correct use of these escape characters can make the code more standardized and understandable, and can also avoid errors caused by the special meanings of some characters. I hope this article can be helpful to everyone.

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