readln
    The following is a list of properties for the function readln:
| Property | Value | 
|---|---|
brief | Read from a UTF-8 text stream line | 
category | stream | 
description | Read a UTF-8 text stream line. The stream must contain valid UTF-8 or an error is thrown. | 
functionId | readln | 
functionLabel | readln | 
parameters | [ { "brief": "Stream number", "dataType": "integer", "description": "Stream number", "name": "streamNumber" } ] | 
returns | { "dataType": "string", "brief": "The string read", "description": "The UTF-8 string read." } | 
sideEffects | [ "Stream modified" ] |