variables in python

 

Variable

        a variable is a name of the memory location. it is used to store data. its value can be changed, and it can be reused many times

• the value stored in a variable can be changed during program execution
• all the operations done on the variable effects that memory location

a variable is created the moment you first assign a value to it

Example:

x=10
y=20
print(x)
print(y)

Rules for Creating Variable:

• A variable name must start with a letter or the underscore character
• A variable name cannot start with a number
• A variable name name only contain alpha-numeric characters and underscore ( A-Z, a-z, 0-9 and _ )
• Variable names are case-sensitive
• The reserved keywords cannot be used as variable

hhuh