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Variable
Variables are containers for storing data values.
A variable is a name which refers to a value. A variable is created when a value is assigned with the
help of an assignment operator (=). print() statement is used to display the values of variables.
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The rules for naming a variable in Python are as follows:
l The name should begin with an uppercase or a lowercase alphabet or an underscore sign (_). This
may be followed by any combination of characters a-z, A-Z, 0-9 or underscore (_). A variable
cannot start with a digit.
l It can be of any length. It is preferred to keep it short and meaningful.
l It should not be a keyword or reserved word.
l Special symbols like !, @, #, $, %, and so on cannot be used in variables.
Input Command
The input() function allows user input. There are two types of input commands:
(a) Asking the user to provide the input.
Example: Asking for name.
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