Variable declaration in python

Image credits: Google

Variable is are used to store values in it.

You can assume variable is a like a box and value is which you can store in the box

Rules to declare variables and indentifiers

Identifiers - Names to given variables, classes, methods etc...

1. Identifiers cannot be a keyword.

2. Identifiers are case-sensitive.

3. It can have a sequence of letters and digits. However, it must begin with a letter or _. The first letter of an identifier cannot be a digit.

4. It's a convention to start an identifier with a letter rather _.

5. Whitespaces are not allowed.

6. We cannot use special symbols like !, @, #, $, and so on.

Declaring a variable in python

Declaring variable a which a is the variable name and value 56 is stored in it

And we don't need tell explicitly data type of our variable which will store that data type value

Python will implicitly do it

Output:

  int means integer

We can also change value in our variable

Output:

We can also restore different data type value in our variable

Output:

int means integer data type

str means string data type

Image credits: Programiz

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