beginnerData Types

Data Types

Explore Python built-in data types: int, float, str, bool, and more.

In this lesson

01Numeric Types

Python has three numeric types: int (integers), float (decimal numbers), and complex numbers.

Python
1x = 10          # int
2y = 3.14        # float
3z = 2 + 3j      # complex
4

5print(type(x))  # <class 'int'>
6print(type(y))  # <class 'float'>
7print(type(z))  # <class 'complex'>
Output
<class 'int'>
<class 'float'>
<class 'complex'>

02Strings

Strings are sequences of characters enclosed in single or double quotes. They are immutable.

Python
1name = "Python"
2greeting = 'Hello'
3multiline = """This is
4a multiline
5string"""
6

7print(len(name))       # 6
8print(name.upper())    # PYTHON
9print(name[0])         # P
10print(name[-1])        # n
11print(name[0:3])       # Pyt
Output
6
PYTHON
P
n
Pyt

03Booleans

Booleans represent True or False values. They are often used in conditional statements.

Python
1is_active = True
2is_deleted = False
3

4print(bool(0))        # False
5print(bool(1))        # True
6print(bool(""))       # False
7print(bool("hello"))  # True
8print(bool([]))       # False
Output
False
True
False
True
False

04Type Conversion

You can convert between types using built-in functions like int(), float(), str(), and bool().

Python
1x = int("10")       # string to int
2y = float("3.14")   # string to float
3z = str(42)          # int to string
4w = bool(1)          # int to bool
5

6print(x, y, z, w)
Output
10 3.14 42 True
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