Arrays are collections of values of the same type sequentially stored in the memory.
Arrays support the index and slice operators, which is explained in detail here.
let mut fibbonaci = [0, 1, 1, 2, 3, 5, 8, 13]; let element = fibbonaci; fibbonaci = 1;
There is a minor restriction for arrays at the current language state. Arrays cannot be indexed with a witness value, but only with a constant or witness-independent variable.