Python Syntax

Python syntax

Created By: chatGPT

In Python, syntax refers to the set of rules that define how a Python program is constructed. Basic syntax includes how to declare variables, define functions, and create control flow statements. Understanding these rules is essential for writing correct code.

# Example of variable declaration
name = 'John'
age = 30

Comments in Python are essential for making your code readable. They are ignored by the interpreter. You can create a comment by starting a line with the # symbol.

# This is a comment
print('Hello, World!')  # This prints to the console

A function in Python is defined using the def keyword, followed by the function name and parentheses. This allows you to encapsulate code for reuse.

def greet(name):
    return f'Hello, {name}!'

Indentation is crucial in Python, as it determines the block of code. For example, the code inside a function or a loop must be indented consistently.

if age >= 18:
    print('You are an adult.')
else:
    print('You are a minor.')

You can use lists to store collections of items. Lists are created by enclosing items in square brackets, separated by commas. They allow for flexible data handling.

fruits = ['apple', 'banana', 'cherry']
print(fruits[0])  # Output: apple

Python includes several data types such as integers, floats, strings, and booleans. Understanding these types is essential for correct operations and function arguments.

integer_value = 10
float_value = 10.5
string_value = 'Hello'
boolean_value = True

Loops enable repetitive execution of code. The for loop is commonly used to iterate over sequences like lists.

for fruit in fruits:
    print(fruit)

To handle errors, Python uses exceptions. You can use try and except blocks to catch and handle exceptions gracefully.

try:
    result = 10 / 0
except ZeroDivisionError:
    print('Cannot divide by zero!')