Variables

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Python - Variables

A Python variable is a reserved memory location to store values. In other words, a variable in a python program gives data to the computer for processing. Every value in Python has a datatype.

Python is object oriented programming language. Every variable in Python is an object. There are Different types of variables.

• Creating Variables


• Multiple Variables


• Output Variables


• Global Variables

Creating Variables

To Create a Variable in Python,all you need to specify the variable name then assign a value to it

<variable name> = <value>

Python uses = to assign value to variables.There's no need to declare in advance,assigning a value to a variable itself declares and initializes the variable with that value.There is no way to declare a variable without assigning it an intial value.

Example

a = 2
b = "sri" 
print(a)
print(b)


#output = 2
#output = sri

Multiple Variables

Python allows you to assign values to multiple variables in one line

< variable names> = < value1,value2,value3.....>

Example

a, b, c = 1, 2, 3
print(a, b, c)


#output: 1 2 3

Output Variables

The Python 'print' statement is often used to output variables.

To combine both text and a variable, Python uses the + character

a = "language"
print("Python is a " + a)

#output: Python is a language

For numbers, the + character works as a mathematical operator

a = 4
b = 3
print(a + b)


#output: 7

Global Variable

Variables that are created outside of a function (as in all of the examples above) are known as global variables.
Global variables can be used by everyone, both inside of functions and outside.

a = "language"

def myfunc():
  print("Python is a " + x)

myfunc() 


#output: Python is a language