rustHow to print a Rust HashMap?

Printing a Rust HashMap is easy and can be done in a few steps.

Example code

use std::collections::HashMap;

fn main() {
    let mut map = HashMap::new();
    map.insert("key1", "value1");
    map.insert("key2", "value2");

    for (key, value) in &map {
        println!("{}: {}", key, value);
    }
}

Output example

key1: value1
key2: value2

The code consists of the following parts:

1. use std::collections::HashMap; - imports the HashMap type from the standard library.
2. let mut map = HashMap::new(); - creates a new empty HashMap.
3. map.insert("key1", "value1"); - inserts a key-value pair into the HashMap.
4. map.insert("key2", "value2"); - inserts another key-value pair into the HashMap.
5. for (key, value) in &map { - iterates over the HashMap.
6. println!("{}: {}", key, value); - prints the key-value pair.

Helpful links

• Rust HashMap Documentation

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