Data Types and Variables - Python Language
05-09-2020
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Data Types
In any computer programming language, data type defines how a data store in memory. How much memory size occupied by a data is also determined by data types. Like other languages Python has also the following built-in data types.
| Text Type | str |
| Numeric Types | int, float, complex |
| Sequence Types | list, tuple, range |
| Mapping Type | dict |
| Set Types |
set, frozenset |
| Boolean Type | bool |
| Binary Types | bytes, bytearray, memoryview |
Variables
A variable is named memory location. That means a variable basically allocates a memory location, which is mapped with a name called variable name. In python, we can declare a variable without any data type. But its data type was set just after we assign a value to it.
Rules of a variable names
- 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
- Variable names are case-sensitive (Name, name and NAME are three different variables)
Assign multiple variables with multiple values in one line
We can assign multiple values in different variables in a line.
x,y,z=10,20,30
This line is equivalent to
x=10
y=20
z=30
Assign multiple variables with the same value
x=y=z=10
This line is equivalent to
x=10
y=10
z=10
