toInt function
Converts the string to an integer.
Returns null if the string cannot be parsed. An optional radix
between 2 and 36 may be supplied.
Example:
toInt('42'); // 42
toInt('ff', radix: 16); // 255
toInt('abc'); // null
Implementation
int? toInt(String str, {int? radix}) => int.tryParse(str.trim(), radix: radix);