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const range = (from, to, step) => {
let res = []
let backward = false
if (from > to) {
[from, to] = [to, from]
backward = true
}
for (let i = from; i <= to; i += step) {
res.push(i)
}
if (backward) {
res.reverse()
return res
}
return res
}
console.log(range(1, 10, 2)) // [1, 3, 5, 7, 9]
console.log(range(10, 1, 2)) // [9, 7, 5, 3, 1]
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