Tuples in Rust

Fixed-size groups of mixed types.

fn main() {
    let point = (3, 7, 2);
    let (x, y, z) = point;

    let first = point.0;
    let sum = x + y + z;

    let mixed: (i32, f64, char) = (1, 2.5, 'z');
    let unit = ();
    println!("{first} {sum} {}", mixed.1);
    let _ = unit;
}

How it works

1. A tuple destructures into named bindings.
2. .0, .1 index positions directly.
3. () is the unit type, meaning no value.

Keywords and builtins used here

• char
• f64
• fn
• i32
• let
• main

The run, in numbers

Lines

12

Characters to type

216

Tokens

85

Three-star pace

85 tpm

At the three-star pace of 85 tokens a minute, this run takes about 60 seconds.

Type this snippet

Step 1 of 4 in Compound values, step 7 of 39 in Language basics.

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Tuples in other languages

• TypeScript