How do I write a multi-line string in Rust?

In Rust, multi-line strings can be written using raw string literals. Raw strings start with r#" and end with "#. If the string content contains " characters, you can add more # characters between r#" and "# to avoid conflicts.

This approach is ideal for writing strings that contain multiple lines or special characters, as it eliminates the need for escape characters. Here is an example:

rust
fn main() {
    let multiline_string = r#"这是一个
多行
字符串"#;

    println!("{}", multiline_string);
}

In this example, multiline_string holds a three-line string, with actual newline characters separating each line. The advantage of this method is high readability and ease of maintenance.

If you need to include " characters within the string, you can construct the raw string with more # characters, as shown below:

rust
fn main() {
    let complex_string = r##"这个字符串包含特殊字符 " 和 # "##;

    println!("{}", complex_string);
}

In this example, two # characters are used, allowing the string to contain " and # without escape characters. This approach is particularly useful when handling code or configuration files.