Rust backslash in '' not terminated

in my rust program, I need to declare a mutable variable called start and assign it the value of a backslash later on.

let mut start = '\';

however, the compiler throws this error:

error[E0762]: unterminated character literal
  --> src/main.rs:35:19
   |
35 |   let mut start = '\';
   |

I have already tried using “and "" instead of ” but the error persists. Why is this??

>Solution :

You have to escape the \ like so: '\\' to get a char or like this: "\\" if you want to have a &str
If you later want to edit that variable like the mut suggests you probably want a proper String like this:
String::from("\\")