Range expressions - The Rust Reference

# Range expressions

The `..` operator will construct an object of one of the `std::ops::Range` (or `core::ops::Range`) variants.

    # #![allow(unused_variables)]
    #fn main() {
    1..2;   // std::ops::Range
    3..;    // std::ops::RangeFrom
    ..4;    // std::ops::RangeTo
    ..;     // std::ops::RangeFull
    #}

The following expressions are equivalent.

    # #![allow(unused_variables)]
    #fn main() {
    let x = std::ops::Range {start: 0, end: 10};
    let y = 0..10;

    assert_eq!(x, y);
    #}