Variables in Python
Variables in Python:
In Python, variables are used to store data values. Variables are essentially names that refer to a particular location in memory where a value is stored. In the context of data storage, variables can be viewed as containers.
Variable in Python
In Python, variables are used as a container and when we assign a value, a variable is created.
There are some rules of Python variable:
- Variable names must begin with either an underscore (_) or a letter (a-z, A-Z).
- The remaining characters in the variable name can be letters, numbers (0–9), and underscores.
- MyVar and myvar are different variables because variable names are case-sensitive.
- Some reserved keywords in Python (including if, while, and for) cannot be used as variable names.
Tasks done in Python Variable:
Assigning a Value:
For Assign a value we use single equals sign (=).
Example: x = 32
#Here ‘x’ is a variable and it contain the value ’32’.
Casting:
Casting is a technique that can be used to specify the data type of a variable.
Example:
- x = float(3) #x will be 3.0
- y = str(3) #y will be ‘3’
Get the Type:
The type() method provides the data type of a variable.
Example:
- print(type(3)) #int
- print(type(“Prepinsta”)) #str
Case Sensitive:
Variables are case sensitive.
Example:
X = 30
x = 3
#x will not overwrite
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