The parseInt function is used to convert a string into an integer. It takes two parameters, the first one is the string to convert, and the second one is the radix (or base) for the conversion, normally only the first parameter is needed.
If a string cannot be converted to an integer, parseInt returns NaN (Not a Number).
The parseInt function will ignore any leading spaces in a string until it finds the first numerical digit or plus/minus sign. If the first character of the string cannot be converted to a number, it will return NaN.
The parseInt function converts a string based on the radix specified in the second parameter. If the second parameter is not provided, it will default to converting based on decimal.
When using parseInt for converting bases, make sure the string meets the requirements of the specified radix to avoid unexpected results.
To avoid unexpected results, it is recommended to use the Number constructor or the unary plus operator (+) for converting strings, as the behavior of parseInt can be unpredictable.
