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rust random number in range

Duco Defiant Dogfish answered on March 1, 2021 Popularity 9/10 Helpfulness 9/10

answer rust random number in range

related rust random range

rust random number in range

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use rand::Rng;

fn main() {
    let mut rng = rand::thread_rng();
    println!("Integer: {}", rng.gen_range(0..10));
    println!("Float: {}", rng.gen_range(0.0..10.0));
}

Popularity 9/10 Helpfulness 9/10 Language rust

Source: Grepper

Tags: random range rust

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Contributed on Mar 01 2021

Duco Defiant Dogfish

0 Answers Avg Quality 2/10

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rust random range

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// for a small amount of random number gen_range is nice but if you need
// to generate a lot of numbers in the same range you should use
// a Uniform distribution instead such as follow
use rand::distributions::{Distribution, Uniform};

let between = Uniform::from(10..10000);
let mut rng = rand::thread_rng();
let mut sum = 0;
for _ in 0..1000 {
    sum += between.sample(&mut rng);
}
println!("{}", sum);

gen_range is optimised for the case that only a single sample is made from the given range, it's better to use the Uniform distribution if you need to generate repeatedly

Popularity 7/10 Helpfulness 5/10 Language rust

Source: docs.rs

Tags: random range rust

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Contributed on Jul 03 2023

Sorann

0 Answers Avg Quality 2/10

rust random number in range

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