Converts str, which is expected to contain a decimal number, to the
number it represents. Tailing and leading whitespace is allowed and will
be trimmed. If src contains non-decimal digit characters after trimming,
conversion will be stopped at the first non-decimal digit character.
Converts str, which is expected to contain a decimal number, to the number it represents. Tailing and leading whitespace is allowed and will be trimmed. If src contains non-decimal digit characters after trimming, conversion will be stopped at the first non-decimal digit character.