is a popular programming language
developed by Guido van Rossum released in 1991
python
who is the developer of python
Guido van Rossum
what the use of python
used for:
* Web development (server-side),
* Software development,
* Mathematics, and
* System scripting
s a name used to identify a variable,
function, class, module or other object. An identifier starts
with a letter A to Z or a to z or an underscore (_) followed
by zero or more letters, underscores and digits (0 to 9
pythpn identifiers
- Python does not allow punctuation characters such as
@, $, and % within identifiers
Python Class names start with an
an uppercase letter
All
other identifiers start with a
lowercase letter.
Starting an identifier with a single leading underscor
indicates that the identifier is private identifier
Starting an identifier with two leading underscores
indicates a strongly private identifier.
If the identifier also ends with two trailing underscores
he identifier is a language-defined special name
A variable can have a short name
(like x and y) or a more
descriptive name (age, carname, total_volume)
A variable name must start with a
letter or the underscore
character
A variable name cannot start with a
number
A variable name can only contain alpha-numeric
characters and underscores
(A-z, 0-9, and _ )
Variable names are case-sensitive
(age, Age and AGE
are three different variables)
A variable name cannot be any of the Python keywords
