How to Generate Random Numbers in Rust (rand crate)

Add the rand crate to your Cargo.toml, import the Rng trait, and call gen_range on a seeded random number generator.

1. Add the dependency to Cargo.toml. rand = "0.8"

2. Import the necessary items in src/main.rs. use rand::{Rng, SeedableRng};

3. Generate a random number between 1 and 100. let mut rng = rand::rngs::StdRng::seed_from_u64(42); let random_number = rng.gen_range(1..101);

4. Print the result to verify. println!("Random number: {}", random_number);

Generating random numbers in Rust with the rand crate sets up an external tool to produce unpredictable values for your program. It is like adding a digital dice roller to your project so you can simulate chance or randomness. You use this whenever your code needs to make random choices, such as in games or simulations.