PYTHON VARIABLES

 

Variables are containers for store the date 

Python has no command for declaring a variable 


  • A Variable name must start with a letter or underscore 
  • a variable name cannot start with a number
  • A variable name can only contain alpha-numeric and underscore 
  • Variable names are case sensitive 
  • A variable name cannot be any of the python Keywords


SYNATAX 

a = 10

b = "RAMAKRISHNA"

print (a)

print(b)

OUTPUT

10

RAMAKRISHNA

 In Python, you can store any value in a variable without specifying its type, and change it anytime.

SYNATAX 

a = 10

A = "RAMAKRISHNA"

print (a)

OUTPUT

RAMAKRISHNA


CASTING

In python you can declare data types of a variable by using casting

SYNATAX 

a = int(10)

b = str("RAMAKRISHNA")

print (a)

print(b)

OUTPUT

10

RAMAKRISHNA



String variable can be declare either single quotation or double quotations 


SYNATAX 

a = 'Ramakrishna'

b = "RAMAKRISHNA"

print (a)

print(b)

OUTPUT

Ramakrishna

RAMAKRISHNA



CASE SENSITIVE 

Python variables name are case sensitive 

SYNATAX 

a = 10

A = "RAMAKRISHNA"

print (a)

print(b)

OUTPUT

10

RAMAKRISHNA


DIFFERENT TYPES OF VARIABLE NAMES

CAMEL CASE

Each word expect the first start with a capital letter

EX: myVariableName = "Ramakrishna"

PASCAL CASE

Each word start with a capital letter

EX: MyVariableName = "Ramakrishna"

SNAKE CASE

Each word separated with underscore 

EX: my_variable_name = "Ramakrishna"


ASSIGN MANY VALUES TO VARIABLES


In python allows assign many values to variables in a single line 

 SYNTAX

x, y, z = "apple", "graphs", "oranges"

print(x)

print(y)

print(z)

OUTPUT

apple

graphs

oranges

 ONE VALUE IN MULTIBLE VARIABLES 

SYNTAX

X = Y = Z = "apple" 

print(X)

print(Y)

print(Z)

OUTPUT 

apple

GET THE TYPE

You can get the data type of a variable using type(). function.

SYNTAX

a = 10

b = "ramakrishna"

c = 10.5

print(type(a))

print(type(b))

print(type(c))

OUTPUT

int

str

float