Variables in Python

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A Python variable is a maintained memory location to store values. In other words, a variable in a python program saves data and returns it to the computer for processing.

• Creating variables in Python:- write the variable name on the left side of = and the value on the right side. There is no special process for defining the type or genre of the variable. See examples below.

>>> a=10
>>> b=12.2
>>> c="Welcome to The Code Panda"


• Reading variables in Python:- Just simply call or print them. You can use your variable at any place in the current program. Note: variable must be defined first before using them.

>>> print(a)
10
>>> print(b)
12.2
>>> print(c)
'Welcome to The Code Panda'


How to Choose Name for your Variable

  • variable names in Python can be of any length.
  • variable names can be any combination of alphabet, symbols, digits. Forex: name_1, person@name
  • words should be separated by an underscore(_), not spaces. ex: first_name
  • You can also use the Camel version of words like firstName or new phone number.


How to not Choose Name for your Variable

  • any word starting from a digit or special symbol can't be used as the variable name. Forex: 1name, @call, $person1
  • Avoid using keywords as a variable name like class or and etc.
  • Avoid using built-in func's name as a variable name like sum or max etc.
  • You can identify built-in or keywords when a word changes its color in Python IDLE.
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