# Number in range

Checks if the given number falls within the given range.

- Use arithmetic comparison to check if the given number is in the specified range.
- If the second argument,
`end`

, is not specified, the range is considered to be from`0`

to`start`

.

const inRange = (n, start, end = null) => { if (end && start > end) [end, start] = [start, end]; return end == null ? n >= 0 && n < start : n >= start && n < end; }; inRange(3, 2, 5); // true inRange(3, 4); // true inRange(2, 3, 5); // false inRange(3, 2); // false