Expressions vs statements

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• Expressions have a return value do NOT need a trailing semi-colon
• Statements do not have values and need a semi-colon

examples/other/statements/src/main.rs

fn main() {
    let x = 2;
    println!("{x}");

    let y = {
        let a = 2;
        let b = 3;
        a + b   // no semi-colon here!
    };          // there is a semi-colon here!
    println!("{y}");
}