String Comparison

There are two main ways to create strings in Rust:

Method 1: Simple string literals (str):

let str1 = "hello";
let str2 = "hello";
let str3 = "Hello";

These are simple, fixed strings that are built into your program.

Method 2: Full Strings (String):

let string1: String = "hello".to_string();
let string2: String = String::from("hello");
let string3 = "hello".to_owned();

These create a more flexible type of string that you can change later. All three lines do basically the same thing, they're just different ways to write it.

The :: in String::from("hello") is Rust's way of calling a function that belongs directly to a type — here, from is a function provided by the String type itself. You'll see this :: syntax used with types throughout Rust.

For most string comparisons, both types work the same way:

let result1 = str1 == str2;  // true
let result2 = str1 == str3;  // false (case-sensitive)

// Comparing String with String
let result3 = string1 == string2;  // true

// You can even compare String with &str
let result4 = string1 == str1;     // true