Irrespective of the programming language, errors will occur. We need to be able to handle these errors. In Rust programming, we have two types of errors:

1. Unrecoverable errors: Like Macro in Clang, Rust has a similar panic! function. Take a look at the following example, which shows how we can handle unrecoverable errors using the panic! function inside the main:

fn main() 
{
   panic!("Something is wrong... Check for Errors");
}

2. Recoverable error: This is a standard part of programming and is nicely handled by Rust. Take a look at the following example. When you call File::open and an error occurs, it will call the panic function:

use std::fs::File;
fn main() {
  let _E = File::open("PacktDocument.txt");
  let _E = match _E
 {   Ok(file) => file,
     Err(why) => panic!("Something is wrong with the Document {:?}", why),
 };
}