How to create a HashMap literal in Rust: macros and manual creation

Hello everyone! I just started learning Rust and I'm having trouble creating a HashMap. In other languages, like Python or JavaScript, you can simply write `{"key": "value"}` and get a dictionary. But in Rust, I can't find a simple way to create a HashMap with initial values. Here's what I tried: ```rust use std::collections::HashMap; fn main() { // Trying to create a HashMap with a key-value pair let map = HashMap::new(); map.insert("name", "Alice"); map.insert("age", "30"); println!("{:?}", map); } ``` But the compiler complains that I'm using `insert` with an immutable variable. I understand that I need to add `mut`, but it's kind of inconvenient. Maybe there's a way to create a HashMap in one line, like in other languages? I've heard about the `vec!` macro.