Python Basics

Python’s syntax is designed to be clear and concise, making it easy to read and write code. Indentation plays a crucial role in Python, defining code blocks instead of using curly braces {}. Let’s look at an example:

# Example of Python code structure
def greet(name):
print(“Hello, ” + name + “!”)

In Python, you can create variables and assign values to them without explicitly declaring the data type. Python infers the data type based on the assigned value. Here’s an example:

# Example of variables and data types
age = 25 # Integer data type
name = “Alice” # String data type
is_student = True # Boolean data type

# Type conversion
age_str = str(age) # Convert integer to string

Python supports a wide range of operators for various operations, such as arithmetic, comparison, logical, and assignment. Let’s take a look:

# Example of operators and expressions
num1 = 10
num2 = 5

sum = num1 + num2 # Addition
is_greater = num1 > num2 # Comparison
is_true = True and False # Logical AND

Control flow statements help you control the flow of execution based on certain conditions. Python uses the if-else statement for decision-making. Here’s an example:

# Example of if-else statement
score = 85

if score >= 90:
print(“Excellent!”)
elif score >= 70:
print(“Good job!”)
else:
print(“Keep practicing!”)

Loops are essential for repetitive tasks. Python offers two types of loops: for and while. The break statement allows you to exit a loop prematurely, while continue skips the current iteration and moves to the next one.

# Example of for loop
for i in range(5):
print(“Iteration:”, i)

# Example of while loop
count = 0
while count < 3:
print(“Count:”, count)
count += 1