Since all rust hello world tutorials usually start like this:

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fn main(){
  println("Hello, world");
}

It’s unclear where to take command line arguments.

The solution:

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use std::os;

fn main(){
  let args: ~[~str] = os::args();
  println(args.to_str());
}

This will give you a vector with strings where first string will be the app being run and the rest is the arguments provided.

rust-0.7