🦀 rustc Compiler Engine

Free Online Rust Compiler

Write, compile, and run Rust code online with rustc compiler, memory safety checking, cargo support, and Monaco editor.

Overview of Rust Compiler

Rust is a systems programming language focused on speed, memory safety, and safe concurrency without a garbage collector. Our Online Rust Compiler runs rustc inside a secure Linux container, allowing you to test ownership, borrowing, and vectors without installing rustup locally.

How to Use the Rust Compiler

  1. Write fn main() code in editor.
  2. Click green ▶ Run Code button to compile via rustc.
  3. Review output and borrow checker diagnostic logs.

🧪 Tested Code Examples (Rust)

Example 1: Rust Fn Main & Vectors

fn main() {
    println!("Hello, World from Online Rust Compiler!");
    
    let numbers = vec![10, 20, 30, 40];
    let sum: i32 = numbers.iter().sum();
    println!("Sum: {}", sum);
}
Expected Output: 
Hello, World from Online Rust Compiler!
Sum: 100

Code Explanation: println! macro prints formatted output. Rust guarantees memory safety at compile time.

💡 Try modifying these examples and execute them directly in the compiler editor above!

🛠️ Common Rust Compiler Errors & Fixes

⚠️ cannot borrow as mutable

Cause: Attempting to mutate an immutable variable binding.

How to Fix: Declare variable with let mut binding.

Frequently Asked Questions (FAQ)

Q: Which Rust compiler is used?

Our compiler uses stable rustc on 64-bit Linux.