0 the symbol \ used for separating words or numbers in the names of computer files
1 the symbol \ that is used for separating words, letters, or numbers in the names of computer files:
C:\Program files
To include a double quotation mark in a string, precede it with a backslash or enclose the string in single quotes.
In mathematics, a backslash-like symbol is used for the set difference.
In either case, a prohibited character can typically be included by escaping it with a preceding backslash.
If you want to use any of these characters as a literal in a regex, you need to escape them with a backslash.
In such cases the code for a backslash is being drawn as these characters.
With this syntax, a backslash causes the metacharacter to be treated as a literal character.
Due to limitations of the tokenizer, raw strings may not have a trailing backslash.
The backslash is used to represent the escape character in a string literal.
