In programming, data type is an important concept.
Variables can store data of different types, and different types can do different things.
Python has the following data types built-in by default, in these categories:
| 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 |
| None Type: | NoneType |
You can get the data type of any object by using the type() function:
Print the data type of the variable x:
x = 5
print(type(x))
In Python, the data type is set when you assign a value to a variable:
| Example | Data Type | Try it |
|---|---|---|
| x = "Hello World" | str | Try it » |
| x = 20 | int | Try it » |
| x = 20.5 | float | Try it » |
| x = 1j | complex | Try it » |
| x = ["apple", "banana", "cherry"] | list | Try it » |
| x = ("apple", "banana", "cherry") | tuple | Try it » |
| x = range(6) | range | Try it » |
| x = {"name" : "John", "age" : 36} | dict | Try it » |
| x = {"apple", "banana", "cherry"} | set | Try it » |
| x = frozenset({"apple", "banana", "cherry"}) | frozenset | Try it » |
| x = True | bool | Try it » |
| x = b"Hello" | bytes | Try it » |
| x = bytearray(5) | bytearray | Try it » |
| x = memoryview(bytes(5)) | memoryview | Try it » |
| x = None | NoneType |
If you want to specify the data type, you can use the following constructor functions: