Python Variables Types
Table of Contents
Introduction Variables and Its Types:
In a computer programming a variable is a small piece of storage location which identifying the memory. And it’s paired with associated symbol name (identifier). A variable is known or unknown as quantity of information referred to given value.
In other computer languages for example c ++, c# and java you may have observed before define the variable first you define the type of variable then assign the value. For example string mystring = ryk or int myInt = 11 or Dim price as Double but in python you don’t need to defined first the data type. You should declared a variable direct and assign its values.
After assigning a value to a variable python automatically understand the type of data which you have declared. For example
>>>> myInt = 11
>>>>myInt
>>>>11
After the declaration a variable and give it value then press the enter and call the above variable the python automatically understand the data type which is string, int, double, float , decimal, date and whatsoever.
But when define a string variable but you assign a integer value the python IDLE give you a error. For example
>>>>myInt = gsstech
Traceback (most recent call last):
File “<pyshell#0>”, line 1, in
myInt = gsstech
NameError: name gsstech is not defined
Python Variables Types
:
Int, Double, Float, Decimal, String, DateTime
Rules Of Variable Name In Python:
In python there are some rules to declare a variable before define a variable you must follow these rules.
- A variable must start a letter or underscore_
Example:
>>> _age = 22
>>> _age
22
>>>
2. A variable must contain letter, number and underscore
3. A variable must have case sensitive
>>> MyInt
Traceback (most recent call last):
File “<pyshell#7>”, line 1, in <module>
MyInt
NameError: name ‘MyInt’ is not defined
>>>
The valid method of declaration of a variable in python.
>>> age = 22
>>>
Don’t declare a variable with special simple for example @,#,$,%,^,& and *. In Python these simple are invalid. For example
>>>>#Int = 11
>>>>@Int = 11
>>>>$Int = 11
>>>>$Int
>>>
When you define a variable with wrong symbol the python ide don’t give you result. You cann’t access these types of variables.
. You may define a variable with letter and number combination
Example:
>>> age = 22
>>> age22 = 22
>>> age22
22
>>>
But in python a variable cann’t start with a number. For example
>>> 22age = 22
SyntaxError: invalid syntax
>>>
The above method is totally invalid. Python ide prompt you that variable have syntax error.
When you define a variable with above simple the python automatically deduct and highlight with the red font. Its mean these method are invalid.
Reserved Words: || Python Variables Types
In python there are some reserved words you don’t use them in variable declaration. When you trying to use these reserved word the python will not give you result. These are following
And, del, for, is raise
Assert, elif, form, lambda, return
Break, else, global, not try
Class, except, if or while
Continue, exec, import, pass, yield
Def ?nally in print
If I declare variable from above word the pythom give me the syntax error. For example
>>> try = 22
SyntaxError: invalid syntax
>>>
>>> for = ryk
SyntaxError: invalid syntax
>>>
Please note while you writing these words the python automatically change its color orange and you can’t use them.
Rules of declaration of variables in python:
In python you must follow the rules before deflation of a variable. For example
Integer Variable
>>> myInt = 13
>>> myInt
13
>>>
Float Variable
>>> myFloat = 15.8
>>> myFloat
15.8
>>>
In python you may also assign a complex value to a variable which may be either string and number. These are also valid. For example
>>> myComplex = 25j
>>> myComplex
25j
>>>
You may access the power of any number in python be declare in variable. For example
>>> myNum = 2e5
>>> myNum
200000.0
>>>
Conclusion: || Python Variables Types
Python language is a easy to understand . In python learning there are no need to have other languages such as C#, Java, Php, C++, ASP.Net, VB.Net. Because its syntax so easy. In python variables types there are no need to write a long phrase for declare a variable.
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