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To use Rust’s `to_uppercase()` method, simply call it on a string variable:
let my_string = "hello, world!";
let uppercase_string = my_string.to_uppercase();
This will output “HELLO, WORLD!” to the console.
It’s important to note that Rust’s `to_uppercase()` method returns a new string rather than modifying the original string in place. This means that you’ll need to assign the result of the method call to a new variable if you want to use the uppercase version of the string.
In addition to `to_uppercase()`, Rust also has a `to_lowercase()` method for converting strings to all lowercase letters. These methods can be useful for a variety of tasks, from formatting user input to comparing strings in a case-insensitive manner.
In summary, if you need to convert a string to all uppercase letters in Rust, simply call the `to_uppercase()` method on the string variable. This will return a new string with all uppercase letters.