13.1 Tuples

We can combine several values in a comma separated list to form tuple.

    1,2.9,"Hello"

The type of this value is:

    int * double * string

The {*} symbol here means that the int, double, and string types are joined into a collective type of all three together--order matters!

The type of a tuple is sometimes called the Cartesian Product (after Descartes). You can retrive a value from a tuple with a integral literal: Note the field numbers are zero origin in keeping with C conventions.

    val x = 1,2.9,"Hello";
    println x.0; // 1
    println x.1; // 2.9
    println x.2; // "Hello"

1
2.9
Hello

There are no tuples with one component.

13.1.1 Unit

    ()