[Python Learning Article] [Book Learning] [Python Standrad Library] Value of [built-in type]

numeric Type- int, float, long, complex

There are four different numeric types: ordinary integers, long integers, floating-point numbers, and complex numbers

A normal integer (or short integer) is implemented using a long in C with a precision of at least 32 bits (Sys.maxint is always set to the maximum normal integer value of the current platform, and the minimum value is -sys.maxint - 1). long integers have infinite precision. floating-point numbers are usually implemented with a double in C;information about the precision of floating-point numbers and their internal representations on the machine on which your program is running is available in sys.float_info . complex numbers have real and imaginary parts, each of which is a floating-point number. to extract these parts from complex Z, use z.real and z.imag. (The standard library includes additional numeric types,fractions supports rational numbers, anddecimal supports a floating-point number for user-defined precision.) )

Sys.maxint = POW (2, 32-1)

>>> Pow (2,4294967296L) >>> pow (2, )1024x768>>> pow (2,2147483648L) > >> sys.maxint2147483647

[Python Learning chapter] [book Learning][python Standrad library][built-in type] value