function range(start, end) { return Array(end - start + 1).fill().map((_, idx) => start + idx) } var result = range(9, 18); // [9, 10, 11, 12, 13, 14, 15, 16, 17, 18] console.log(result);
for (i of range(1, 5)) { console.log(i); } /* Output * 1 2 3 4 5 */ [...range(1, 5)] // [1, 2, 3, 4, 5]
[...Array(100).keys()] //=> [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]