rust argv

In Rust, the argv function is used to retrieve the command-line arguments passed to a Rust program. The argv function is part of the std::env module, which provides access to various environment-related functionalities.

To use argv, you need to import the std::env module by adding use std::env; at the beginning of your Rust file. Then, you can call the args function from the env module to get an iterator over the command-line arguments.

Here's an example of how you can use argv to print all the command-line arguments:

use std::env;

fn main() {
    let args: Vec<String> = env::args().collect();

    for arg in args {
        println!("{}", arg);
    }
}

In this example, the args function returns an iterator over the command-line arguments, which is then collected into a Vec<String>. The for loop iterates over each argument in the vector and prints it using println!.

Keep in mind that the first argument in the args iterator is usually the path to the Rust program itself. If you want to exclude that, you can use the skip method on the iterator, like this: for arg in args.skip(1) { ... }.

That's how you can use argv in Rust to access and process command-line arguments.