how-to-read-all-lines-from-file-in-rust.md

How to read all lines from file in Rust

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Reading all lines from a file in Rust can be done using the std::fs::read_to_string function. This function takes a path to the file as an argument and returns a Result<String, std::io::Error> type. The Result type can be used to check for errors when reading the file. The following ## Code example shows how to read all lines from a file and print them out:

use std::fs;

fn main() {
    let file_contents = fs::read_to_string("my_file.txt").expect("Error reading file");
    println!("{}", file_contents);
}

In the ## Code example, the fs::read_to_string function is used to read the contents of the file into a String type. The expect method is used to check for errors when reading the file. If an error occurs, the expect method will panic and print out an error message. Finally, the contents of the file are printed out using the println! macro.

For more information on reading files in Rust, see the following links:

• std::fs::read_to_string
• std::io::Error
• std::panic

group: rust-files