What are closures in Rust?

What are closures in Rust?

Closures in Rust are anonymous functions that can capture their environment. They allow you to create functions on the fly.

Can you give me an example of a closure in Rust?

Sure! Here's a simple example:

let add = |a, b| a + b;
let result = add(5, 3);
println!("Result: {}", result);

This closure takes two parameters and returns their sum.

How do closures differ from regular functions?

Closures can capture variables from their surrounding scope, while regular functions cannot. This makes closures more flexible.

Are there any performance implications of using closures?

Yes, using closures can introduce some overhead, especially if they capture a lot of data. However, Rust optimizes them well.