--- id: python-syntax title: Python Syntax sidebar_label: Python Syntax #displays in sidebar sidebar_position: 2 tags: [ Python, Introduction of python, Python Syntax, ] --- # Python Syntax Python is known for its clean and readable syntax. It emphasizes code readability and allows developers to write fewer lines of code compared to other programming languages. ### Basic Syntax Structure Python uses indentation instead of curly braces `{}` to define blocks of code. ### Example: ```python if 5 > 2: print("Five is greater than two!") ```` * **Indentation** is crucial in Python. Missing or incorrect indentation will raise an error. ### Comments ### Single-line comment: ```python # This is a comment print("Hello, World!") ``` ### Multi-line comment (using triple quotes): ```python """ This is a multi-line comment """ print("Hello again!") ``` --- ### Variables Python does not require you to declare the type of a variable. ```python x = 10 # integer y = "Hello" # string z = 3.14 # float ``` ### Multiple assignment: ```python a, b, c = 1, 2, 3 ``` --- ### Data Types Some common data types in Python: * `int`: Integer * `float`: Floating point * `str`: String * `bool`: Boolean * `list`: List of items * `tuple`: Immutable list * `dict`: Key-value pair * `set`: Unique unordered collection ```python num = 10 # int name = "Alice" # str items = [1, 2, 3] # list person = {"name": "Bob", "age": 25} # dict ``` --- ### Conditionals ```python age = 18 if age >= 18: print("Adult") elif age > 12: print("Teenager") else: print("Child") ``` --- ### Loops ### `for` loop: ```python for i in range(5): print(i) ``` ### `while` loop: ```python count = 0 while count < 5: print(count) count += 1 ``` --- ### Functions Functions are defined using the `def` keyword. ```python def greet(name): print("Hello, " + name) greet("Alice") ``` ### Return statement: ```python def add(a, b): return a + b result = add(2, 3) print(result) # Output: 5 ``` --- ### Modules and Imports You can import built-in or custom modules. ```python import math print(math.sqrt(16)) # Output: 4.0 ``` --- ### Operators ### Arithmetic Operators: ```python + - * / // % ** ``` ### Comparison Operators: ```python == != > < >= <= ``` ### Logical Operators: ```python and or not ``` --- ### Indentation Rules Python uses **4 spaces** (by convention) for indentation. Do not mix tabs and spaces. Incorrect: ```python if True: print("Hello") # IndentationError ``` Correct: ```python if True: print("Hello") ``` --- ## Conclusion Python syntax is simple, readable, and beginner-friendly. With its use of indentation and minimalistic style, it allows you to focus on solving problems rather than worrying about complex syntax rules. --- > 📌 **Note**: Make sure your Python files have the `.py` extension and you're using Python 3.x version for compatibility with modern features.