Python>>Data Type:Float

Floating point number is real numbers with decimal point (.)or fractional part. It can be positive or negative.

Example:

5678.90
-2.88

0.99

>>> z = -1.234

>>> type(z)

<class ‘float’>

Let’s do arithmetic:

>>> x = 8+8.1

>>> print (x)

16.1

>>> print (type(x))

<class ‘float’>

Some key notes:

1. numbers separated with underscore can consider a valid float as long has decimal point

>>> x = 66_77_88.3_21

>>> type (x)

<class ‘float’>

2. real numbers  with a fractional part represented by scientific notation e or E, or those floating numbers that exceeded the maximum size (1.8 * 10^308), it will be referred as “infinity” or “inf”

>>> 1.8e308

inf

>>> x = 1.8e308

>>> print (x)

inf

>>> type (x)

<class ‘float’>

>>> 0.4e9

400000000.0

>>> x = 0.4e9

>>> type (x)

<class ‘float’>

3. there’s a function float() to convert string into float class.

>>> x = 100

>>> float (x)

100.0