Variables Names
The rules for naming a variable have been mentioned before. The multi-word variable can be named in the following three ways.
- Camel Case - In the camel case, each word in the middle has its first alphabet in capitals. There is no whitespace in between.
For example – nameOfSchool,valueOfBankaccount, etc.
- Pascal Case - It is mostly the same as the Camel Case, but here the first word also needs to start with an uppercase letter.
For example - NumberOfApplicants, etc.
- Snake Case - In the snake case, words are separated with the underscore in between.
For example - number_of_applicants, etc.
The variables are just like containers for storing data values.
Creating Variables in Python:
There is no command in Python for declaring a variable. The variable is formed at the time when you first specify a value to it.
Casting in Python:
If you want to define the data type of a variable in Python, it can be done with casting.
Some rules of Python are mentioned below with example:-
- The name of the variable in Python must start with a letter or with an underscore character.
{Like for example, Myname and _myname}.
- The name of the variable must not begin with a number.
{ 1disc is a wrong way to write the name of a variable}.
- The name of the variable can consist of alphanumeric characters and underscores only.
(Such as from A-z, 0-9, and _ ).
- The variable name in Python is case-sensitive.
{Like for example, name, NAME, and Name are three different things}.
- The variable can be a short name (like n and m) or a more detailed name
(like index, surname, total_volume).
In several programming languages, variables are typed statically. But in the case of the python programming language, variables are not subject to this restriction. A variable may be allotted a value of one type, and later on, the value can be re-assigned with a different type.
