Question

How to generate a random hexadecimal string in Rust

Answer 1

use rand::rng;
use rand::Rng;
use std::fmt::Write;

fn generate_hex(length: usize) -> String {
    let mut rng_instance = rng(); 
    let mut hex_str = String::with_capacity(length);

    for _ in 0..length {
        let digit = rng_instance.random_range(0..16); 
        write!(&mut hex_str, "{:X}", digit).unwrap();
    }

    hex_str
}

fn main() {
    let length = 8;
    let hex_number = generate_hex(length);
    
    println!("Random Hexadecimal Number: {}", hex_number);
}



/*
run:

Random Hexadecimal Number: E0587203

*/

 

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