Page 167 - Computer Science V2.0 Class 11

● float (floating point numbers): A float data type includes the floating point numbers. A floating point
number typically (although not necessarily) includes a decimal point. For example, 10.5, -50.0, 15.908 are
floating-point numbers. Next, let us examine a floating point object fNum, constructed using a floating point
number.
>>> fNum = 2 * 3.14 * 5
>>> type(fNum)
<class 'float'>

Python also allows scientific notation to express floating point numbers. In scientific notation, the symbol E denotes
base 10 for the exponent, For example,
>>> 1.5E2
150.0
2
In the above example, 1.5E2 denotes the number 1.5 × 10 . Next, let us see some more examples,
>>> 1E2
100.0
>>> -2.2E2
-220.0
>>> -2.2E-2
-0.022

● Complex: A complex number is of the form x + yj and comprises a pair of floating point numbers. The first one
(x) is called the real part, and the second one (y) is called the imaginary part. Some examples of complex numbers
are 5 + 6j, 3 - 2j, 2 + j and so on. The real and imaginary parts of a complex number can be retrieved
as shown below:
>>> a = 5 + 6j
>>> a
(5 + 6j)
>>> a.real
5.0
>>> a.imag
6.0
Let us now examine the type of a complex object and its parts,
>>> type(a)
<class 'complex'>
>>> type(a.imag)
<class 'float'>
>>> type(a.real)
<class 'float'>
Note that when we write a = 5 + 6j, Python interprets 5 and 6 as floating point numbers.

In a complex number of the form of the form x+yj, j denotes –1.

7.1.2 bool (Boolean)

In Python, the Boolean data type is called bool and includes two values: True and False. An expression
constructed using Boolean values is called a Boolean expression. Interestingly, in a Boolean expression, Python
considers the numeric value 0 as False and a numeric value other than 0 as True. Now, let us examine the following
examples,
>>> condition = True
>>> type(condition)
<class 'bool'>

Data Types and Operators 153