chr()
chr(n) → string | null
Returns a 1-byte string whose byte value is n — the inverse of string.at(). (Global function.)
Builds a single-byte string from a numeric value. If n is not numeric or is
outside the 0–255 range, null is returned.
Arguments
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
| n | number | yes | — | Byte value, 0–255. |
Returns
string | null
A 1-byte string, or null for invalid input.
Example
chr(0x61) === 'a';