Rust Closures for Beginners | Fn, FnMut, FnOnce & move Keyword Explained | Learn Rust Step by Step

Closures are one of the most powerful features in Rust, but they're also one of the most confusing topics for beginners. In this video, you'll learn everything you need to know about Rust Closures, including how they capture variables, the differences between Fn, FnMut, and FnOnce, the move keyword, and how closures work with iterators. Everything is explained step by step with practical examples. 📚 What you'll learn ✅ What are Closures in Rust? ✅ Closures vs Functions ✅ Anonymous Functions ✅ Closure Syntax ✅ Capturing Variables from the Environment ✅ Mutable Closures ✅ The move Keyword ✅ Understanding Fn, FnMut, and FnOnce ✅ Passing Closures to Functions ✅ Returning Closures from Functions ✅ Closures with Iterators ✅ Using Closures with: map() filter() fold() sort_by() ✅ Real-world Rust Examples 🚀 By the end of this video, you'll understand Why Rust needs closures How closures capture variables automatically When to use Fn, FnMut, and FnOnce Ownership and borrowing inside closures How the move keyword works Why closures are heavily used throughout the Rust standard library How iterators and closures work together to write clean, expressive Rust code