Please explain the meaning of the characters ' \ ' in Java, what is the role?

/*
* 2, please explain the meaning of the characters ' \ ' in Java, what is the role?
*
Answer
* In Java the backslash ' \ ' represents the meaning of the escape character, which is a marker
*
* When the compiler reads this tag, it knows that the next character is not an ordinary character, but a translated character.
* It will operate based on the meaning of the escaped character, rather than using the original character directly.
*
* When encountering some special characters used in Java syntax, to output as-is, you need to precede these special characters with a backslash
* such as the backslash itself, single quotation marks, double quotes, parentheses, etc., because the syntax is already occupied, so to want the output as is, only in front of the plus a backslash.
* For example E:\123.txt path for Java to read need to add a backslash before \ Translate E:\\123.txt
*
*/

Please explain the meaning of the characters ' \ ' in Java, what is the role?