Use and Import

Import items with use keyword.

Difficulty

Beginner

Code

use std::collections::{HashMap, HashSet};
use std::io::{self, Write};

fn main() {
    let mut map = HashMap::new();
    map.insert("key", "value");

    let set: HashSet<i32> = vec![1, 2, 3].into_iter().collect();
    println!("{:?} {:?}", map, set);
}

Explanation

use brings items into scope.

Key Concepts

• Read the code carefully and understand the data flow
• Try modifying the example to see how it changes behavior
• Run this code in the Rust Playground

Related Topics

Browse more examples in the modules category to build a complete understanding of this topic.