What Is the Difference Between loop and while true in Rust?

The loop keyword creates an infinite loop that runs until a break statement is encountered, whereas while true is a conditional loop that checks the boolean true expression before every iteration. Both result in infinite execution, but loop is the idiomatic Rust choice for unbounded repetition because it is more explicit and allows for labeled loops.

fn main() {
    // Idiomatic infinite loop
    loop {
        println!("Running...");
        break; // Must use break to exit
    }

    // Equivalent but less idiomatic
    while true {
        println!("Running...");
        break;
    }
}

Think of loop as a dedicated "run forever" command, while while true is a conditional check that happens to always pass. Both keep your code running until you explicitly tell it to stop, but loop is the standard way Rust developers write infinite cycles. Use loop when you know you need to repeat something indefinitely and will handle the exit logic inside the block.