Collections

Strings

Building Text

String is a growable, owned text buffer. push_str adds text and push adds one character.

Program

Play the program to build a word one piece at a time.

strings.rs 
fn main() {
    let mut sentence = String::new();
    sentence.push_str("Rust");
    sentence.push('!');
    println!("{sentence} ({})", sentence.len());
}
String::new `String::new()` starts an empty owned string.
push_str `push_str` appends a string slice.
push `push` appends a single `char`.