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3.Python Variables

Python Variables.

    In python, variable declaration is not necessary. Variables are used for storing data values. This means that when you create a variable you reserve some space in memory. A variable is created the moment you assign a value to it. 


    Based on the data type of a variable, the interpreter allocates memory and decides what can be stored in the reserved memory. A variable name must start with a letter or the underscore character. starting a variable with a number generates an error. Also Variable names are case-sensitive.

Program:

A=1

B=1.1

C=”Tamil Hacks”

print (A)

print (B)

print (C)

print(“number=”,A)

print(“string=”,C)

print(“string=”+C)

Output:

1                                                                                                                                          

1.1                                                                                                                                           

Tamil Hacks                                                                                                                            

number= 1                                                                                                                                     

string= Tamil Hacks                                                                                                                           

string=Tamil Hacks 

Explanation:

  • Print function is used to output the values of the variable
  • print(“string=”,C) is printed with space (string = Tamil Hacks)    
  • Print(“String=”,+C) is printed without      space  (string=Tamil Hacks) 
  • Python uses the + character To combine both text and a variable
  • Python will give you an error If you try to combine a string and a number.                                                                      

MULTIPLE VARIABLES ASSIGNMENTS:

    Assignments can be done on more than one variable "simultaneously" on the same line. Python allows you to assign values to multiple variables in one line and also to assign the same value to multiple variables in one line.

Program: 
a, b, c = "python", "tamilhacks", 5

print(a)

print(b)

print(c)

Output:

Python

Tamil hacks

5
 


Program: 

a = b = c = "Tamil Hacks" 

print(a) 

print(b) 

print(c) 

Output:

Tamil Hacks

Tamil Hacks

Tamil Hacks

Check out the video below to learn python.


Happy Learning!!

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