Rust Strings Tutorial | String vs &str - Owned and Borrowed Types Explained

🦀 Master Rust Strings - Understanding Owned vs Borrowed String Types! In this beginner-friendly tutorial, you'll learn the essential difference between String and &str in Rust. We'll write real code in nvim with syntax highlighting and see each example run in the terminal. ⏱️ What You'll Learn: 0:00 - Introduction 0:14 - String Basics: String vs &str 3:02 - String Methods: len, contains, replace, and more 5:49 - String Concatenation: 4 Ways to Combine Strings 8:54 - Recap & Next Steps 📚 Topics Covered: • String::from() - Creating owned strings • &str - String slices (borrowed references) • String::new() - Creating empty strings • push_str() - Appending text to strings • len(), is_empty(), contains() - Common methods • replace(), to_uppercase(), to_lowercase() • trim() - Removing whitespace • format!() macro - Flexible string formatting • + operator - Concatenation (moves ownership) • push() - Adding single characters 💻 Code Examples: STRING BASICS: fn main() { let greeting = String::from("Hello, World!"); println!("Greeting: {}", greeting); let name: &str = "Rust"; println!("Language: {}", name); let mut message = String::new(); message.push_str("Learning "); message.push_str("Rust!"); println!("Message: {}", message); } STRING METHODS: fn main() { let text = String::from("Hello Rust"); println!("Length: {}", text.len()); println!("Contains Rust: {}", text.contains("Rust")); println!("Replaced: {}", text.replace("Rust", "World")); println!("Uppercase: {}", text.to_uppercase()); } STRING CONCATENATION: fn main() { // format! macro (most flexible) let combined = format!("{} {}", "Hello", "World"); // push_str method let mut greeting = String::from("Hi "); greeting.push_str("there!"); // + operator (moves first string) let c = String::from("Rust ") + "is fun!"; // push (single character) let mut word = String::from("Hel"); word.push('l'); word.push('o'); } 🔑 Key Differences: • String: Owned, growable, heap-allocated • &str: Borrowed, immutable, string slice • Use String when you need to own or modify • Use &str for function parameters that only read 📌 Subscribe for more Rust tutorials! #Rust #RustLang #Programming #LearnRust #CodingTutorial #Strings #BeginnerProgramming