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Rust program to generate a random password

Rust | Random Numbers Example: Write a program to generate a random password.
Submitted by Nidhi, on November 13, 2021

Problem Solution:

In this program, we will generate a random password and print generated password on the console screen.

Add random external library to your project

1. Create your project using the below command.
   

   $cargo new random --bin

2. Goto the project folder cd random and edit Cargo.toml file.
   

   $random>nano Cargo.toml

3. Then add dependency in Cargo.toml file
   

   [dependencies]
   rand = "0.5.5"

4. After that, build your project using the below command
   

   $random>cargo build

5. Then execute your project after modification in the src/main.rs source file.
   

   $random>cargo run

Program/Source Code:

The source code to generate a random password is given below. The given program is compiled and executed on UBUNTU 18.04 successfully.

// Rust program to generate a 
// random password

use rand::{thread_rng, Rng};
use rand::distributions::Alphanumeric;

fn main() {
    let password: String = thread_rng()
        .sample_iter(&Alphanumeric)
        .take(10)
        .map(char::from)
        .collect();
        
    println!("Generated password: {}", password);
}

Output:

$random> cargo run
Compiling random v0.1.0 (/home/arvind/Desktop/rust/random)
    Finished dev [unoptimized + debuginfo] target(s) in 0.33s
     Running `target/debug/random`

Generated password: AUg2u0JJNx

Explanation:

In the above program, we imported the "rand" library to our project for generating random numbers. We imported the "rand" library using the below line:

use rand::Rng;

In the main() function, we generated a random password using rand library functions and printed the result.

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