There are several built-in data types in Python including numeric, text, sequence, mapping, and boolean types. Numeric types store numbers and include int, float, and complex types. Text is represented by strings which can be single, double, or multi-line. Common sequence types are lists, tuples, and ranges which store ordered collections of values. Mappings store key-value pairs using dictionaries. Boolean type represents True and False values.

2. M Vishnuvardhan
Python Built-in types
Python has the following data types built-in by default, in these categories
Text Type : str
Numeric Types : int, float, complex
Sequence Types : list, tuple, range
Mapping Type : dict
Set Types : set, frozenset
Boolean Type : bool
Binary Types : bytes, bytearray, memoryview
None Type : NoneType

3. M Vishnuvardhan
Python Built-in Types – Numeric
There are three numeric types in Python:
» int - whole number, positive or negative, without decimals, of unlimited
length.
» float – real numbers expressed in decimal or exponential form up to 15
decimal places
» complex – written with a "j" as the imaginary part
Eg: x = 1 # int
y = 2.8 # float
p = 35e38 # float
z = 5+1j # complex

4. M Vishnuvardhan
Python Built-in Types – Strings
String is sequence of Unicode characters. We can use single quotes or
double quotes to represent strings. Multi-line strings can be denoted using
triple quotes, ‘ ‘ ‘ or “ “ “
Eg: a = "Hello“ #string
print(a)
a = """ This is a multi-line
string in python """
print(a)

5. M Vishnuvardhan
Datatype Conversion
Python allows to convert from one type to another with the int(), float(),
complex() and str() methods
Eg: x = 1 # int
y = 2.8 # float
z = 1j # complex
#convert from int to float:
a = float(x)
#convert from float to int:
b = int(y)
#convert from int to complex:
c = complex(x)
NOTE: Complex numbers cannot be converted into another
number type

6. M Vishnuvardhan
Sequence types – Lists
» Lists are used to store multiple items in a single variable
» Lists are created using square brackets.
Eg: fruits = ["apple", "banana", "cherry"]
print(fruits)
» List items are ordered, changeable, and allow duplicate values.
» List items are indexed, the first item has index [0], the second item has
index [1] etc.,
» When we say that lists are ordered, it means that the items have a
defined order, and that order will not change.
» If you add new items to a list, the new items will be placed at the end of
the list.

7. M Vishnuvardhan
Sequence types – Tuple
» Tuples are used to store multiple items in a single variable.
» A tuple is a collection which is ordered and unchangeable.
» Tuples are written with round brackets..
Eg: fruits = ("apple", "banana", "cherry")
print(fruits)
» Tuple items are ordered, unchangeable, and allow duplicate values.
» Tuple items are indexed. When we say that Tuple are ordered, it means
that the items have a defined order, and that order will not change.
» Tuples are unchangeable, meaning that we cannot change, add or
remove items after the tuple has been created.

8. M Vishnuvardhan
Sequence types – Sets
» Sets are used to store multiple items in a single variable.
» A set is a collection which is unordered, unchangeable*, and unindexed
» Eg: fruits = ("apple", "banana", "cherry")
print(fruits)
» Set items are unordered, unchangeable, and do not allow duplicate
values.
» Set items can appear in a different order every time you use them, and
cannot be referred to by index or key.

9. M Vishnuvardhan
Mapping types – Dictionary
» Dictionaries are used to store data values in key : value pairs.
» A dictionary is a collection which is ordered, changeable and do not
allow duplicates.
Eg: stu = { "Name": "Ramu","RollNo": 1234, "Marks": 576 }
print(stu)
» Dictionary items are ordered, changeable, and does not allow
duplicates.
» Dictionary items are presented in key:value pairs, and can be referred to
by using the key name.
Eg: print(stu[“Name”])

10. M Vishnuvardhan
Boolean type- bool
» Booleans represent one of two values: True or False.
» You can evaluate any expression in Python, and get one of two answers,
True or False.
» When you compare two values, the expression is evaluated and Python
returns the Boolean answer
» Eg: print(10 > 9)
print(10 == 9)
print(10 < 9)

11. M Vishnuvardhan