Python Numbers:

Number data types store numeric values. They are immutable data types, which mean that changing the value of a number data type results in a newly allocated object.

Python supports four different numerical types:

·         Int(Signed integers)

·         Long(Long integers)

·         Float(floating point real values)

·         Complex(complex numbers)

You can delete the reference to a  number object by using the del statement. The syntax of the del statement is:

Del var1[, var2 [,var3[…..,varN]]]

Examples:

Int	Long	Float	Complex
10	51924361L	0.0	3.14j
100	-0x19323L	15.20	45.j
-786	0122L	-21.9	9.322e-36j
080	0xDEFABCECBDAECBFBAEl	32.3+e18	.876j
-0490	535633629843L	-90.	-.6545+0J
-0x260	-052318172735L	-32.54e100	3e+26J
0x69	-4721885298529L	70.2-E12	4.53e-7j

·         Python allows you to use a lowercase L with long, but it is recommended that you use only an uppercase L to avoid confusion with the number 1.

·         A complex number consists of an ordered pair of real floating point numbers denoted by a + bj, where a is the real part and b is the imaginary part of the complex number.

Number type conversion:

Python converts numbers internally in an expression containing mixed types to a common type for evaluation. But you’ll need to convert a number explicitly from one type to another to satisfy the requirement of an operator or function parameter.

·         Type int(x) to convert x to a plain integer.

·         Type long(x) to convert x to a long integer.

·         Type float(x) to convert to a floating-point integer.

·         Type complex(x) to convert x to a complex number with real part x and imaginary part zero.

·         Type complex(x, y) to convert x and y to a complex number with real part x and imaginary part y. x and y are numeric expressions.