Variables and Data Types

 '''Variable is like a container that holds data. Very similar to how our containers in kitchen holds sugar, salt etc. Creating a variable is like creating a placeholder in memory and assigning it some value.'''

'''In Python, it is as easy as writing:

a = 1

b = True

c = "Sindhu"

d = None

These are four variables of different data types.'''

a = 1

print(a)                          #output=1

b = True

print(b)                          #output=True

c = "Sindhu"

print(c)                          #output=Sindhu

d = None

print(d)                          #output=None

'''What is data type?

Data type specifies the type of value a variale holds. This is required in programming to do various operations without causing an error.'''

print(type(a))                    #output=<class 'int'> i.e. integer

print(type(b))                    #output=<class 'bool'> i.e. boolean

print(type(c))                    #output=<class 'str'> i.e. string

print(type(d))                    #output=<class 'NoneType'> i.e. none type

#This code is used to find the data type of a variable.

'''

Types of Data Type:

1. Numeric Data: int, float, complex

int: 3, -8, 0

float: 7.349, -9.0, 0.0000001

complex: 6+2i

2. Text Data: str

"Hello World", "Python Programming"

3. Boolean Data:

Boolean data consists of values True or False

4. Sequenced Data: list, tuple

list: A list is an ordered collection of data with elements separated by a comma and enclosed within square brackets.Lists are mutable and can be modified after creation.

Example:[8,2,3,[-4,5],["apples", "bananas"]]

tuple: A tuple is an ordered collection of data with elements separated by a comma and enclosed within paraentheses. Tuple are immutable and cannot be modified after creation

Example: (("parrot" , "sparrow"), ("lion" , "tiger")) 

5. Mapped Data: dict

dict: A dictionary is an unordered collection of data containing a key:value pair. The key:value pairs are enclosed within curly brackets.

Example: {"name":" Sindhu", "age":23, "Canvote":True}

'''

a1=24.9

print(a1)          #output=24.9

print(type(a1))    #output=<class'float'>

a2=complex(24,9)

print(a2)          #output=24+9j

print(type(a2))    #output=<class'complex'>

list1 = [8,2,3 ,[-4,5],["apple", "banana"]]

print(list1)       #output=[8,2,3 ,[-4,5],['apple', 'banana']]

tuple1 = (("parrot", "sparrow"), ("lion", "tiger"))

print(tuple1)      #output=(('parrot' , 'sparrow'), ('lion', 'tiger'))

dict1 = {"name":"Sindhu" ,"age":23, "Canvote": True}

print(dict1)       #output={'name' : Sindhu" , 'age':23, 'Canvote': True}

'''In Python, everything is an object.'''


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