// int array range [start, stop], step = 1
let myIntArray = Array(stop).fill(start).map((x, y) => x + y)
// Array(12).fill(1).map((x, y) => x + y)
// [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

// int array range [start, stop), step = {step}
const rangeExclusive = (start, stop, step = 1) =>
  Array(Math.ceil((stop - start) / step)).fill(start).map((x, y) => x + y * step)

let myIntArray = rangeExclusive(3, 27, 2)
// [3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25]

// int array range [start, stop], step = {step}
const rangeInclusive = (start, stop, step = 1) =>
  Array(Math.ceil((stop - start) / step) + 1).fill(start).map((x, y) => x + y * step)

let myIntArray = rangeInclusive(3, 27, 2)
// [3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27]