Run Rust Online

main.rs

// Rust 1.85
fn main() {
    println!("Hello from Rust!");
    let sum: u64 = (1..=100).sum();
    println!("Sum of 1..=100 = {}", sum);

    // Fibonacci — fast iterative
    fn fib(n: u32) -> u64 {
        let (mut a, mut b) = (0u64, 1u64);
        for _ in 0..n { let t = a + b; a = b; b = t; }
        a
    }
    println!("fib(40) = {}", fib(40));
}

Output

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About Rust

Rust is a systems language designed for safety and speed without a garbage collector. It powers performance-critical systems at Discord, Cloudflare, and Dropbox. The borrow checker eliminates entire classes of memory bugs at compile time.

Our sandbox runs Rust 1.85 with the standard library. cargo package install is available in Pro+ sessions.

Sandbox Features

Secure execution with Docker + gVisor isolation
Rust 1.85 with standard library
Up to 600s execution time (Mega tier)
Stdin, expected_output, command_line_arguments
Stateful sessions and package install (Pro+)
REST API for programmatic access

Use Rust with stateful sessions

Open a session once, then call execute repeatedly — variables, files, and installed packages persist between runs. Perfect for code interpreters and REPL-style agents.

# 1. Create a session
curl -X POST https://api.sandboxapi.dev/v1/sessions \
  -H "X-RapidAPI-Key: $KEY" \
  -d '{"language":"rust","idle_ttl":300}'
# → {"id":"sess_abc","language":"rust",...}

# 2. Execute — first call
curl -X POST https://api.sandboxapi.dev/v1/sessions/sess_abc/execute \
  -H "X-RapidAPI-Key: $KEY" \
  -d '{"code":"let x = 42; println!(\"{}\", x);"}'

# 3. Execute again — state carries over
curl -X POST https://api.sandboxapi.dev/v1/sessions/sess_abc/execute \
  -H "X-RapidAPI-Key: $KEY" \
  -d '{"code":"// Note: Rust is compiled — sessions persist files, not REPL state"}'

Note: Rust is a compiled language. Sessions persist installed packages and files on disk, but variable state does not carry between calls. Use multi-file submissions or write intermediate state to disk.

Read the sessions docs →

About Rust

Sandbox Features

Use Rust with stateful sessions

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