Returns a decimal number, given a text representation and its base radix.
text is text representing a number with the base radix radix (an integer between 2 and 36).
Any leading spaces and tabs are ignored.
Letters, if any, may be upper or lower case.
If radix is 16 (hexadecimal system), any leading 0x, 0X, x or X is ignored, as is any trailing h or H.
If radix is 2 (binary system), any trailing b or B is ignored.
returns 255 as a number (hexadecimal system).
returns 5 as a number (binary system).