Python Introduction: Python programming language is one of the most popular languages used by programmers worldwide. This programming language. If you want to start learning Python language then the roadmap would be easy and filled with opportunities.
Python programmers are in high demand because the Python language can be integrated and used to build highly advanced technologies. This programming language has the highest library collection compared to any other language. In this article let me give you a Python introduction, its features, and more.
Python Introduction: What Is Python?
Python is a high-level, interpreted programming language known for its simplicity, readability, and versatility. The Python introduction was given by Guido van Rossum in 1991. Python is widely used in web development, data science, machine learning, automation, and more.
Its syntax resembles English, making it an excellent choice for beginners and experienced developers to learn and build a career out of this knowledge. Python provides highly extensive libraries and frameworks which saves time and increases productivity.
Features Of Python Programming Language
In the Python introduction, we are going to first get an overview of the features of the Python programming language.
- Easy to Learn and Use: Python has a simple syntax that promotes readability and reduces the cost of program maintenance. This language is easy to understand and implement due to its syntax having a high resemblance with the simple English language.
- Interpreted Language: Python executes code line-by-line, making debugging easier.
- Versatile: This programming language supports multiple programming types including procedural, object-oriented, and functional programming.
- Extensive Python Libraries: Python provides extensive Python libraries which include libraries like NumPy, pandas, and TensorFlow for diverse applications.
- Cross-Platform: This programming language supports cross platforms and runs on various operating systems including Windows, macOS, and Linux.
- Dynamic Typing: There is no need to declare variable types explicitly in the Python programming language as it can recognize the variable type easily.
- Open-Source Community: Python is free to use and supported by a vast community.
Python Introduction Notes
In this Python introduction series let us also get familiar with data types, indentation, control statements, and functions in Python programming language along with the examples.
1. Variables and Data Types
Variables in Python are used to store data values. In Python, variables are dynamically typed, meaning you don’t need to declare their type explicitly. The type of data stored in the variable determines its data type.
- Integer (int): This data type consists of whole numbers having no fractional part. For example: x = 5 is an example of an integer. We do not have to explicitly mention Python during the declaration, as Python can easily interpret the data types itself.
- Float (float): Floats are numbers with decimal points. These numbers can be represented in fractional format but cannot be represented in whole number format. For example: y = 3.14 is a float number.
- String (str): String data type is a sequence of characters enclosed in quotes. For example: z = “Hello World!”, this is a string enclosed within double inverted commas.
- Complex (complex): These numbers a real and imaginary parts. For example: 2 + 3j is an example of complex numbers with 3j being the imaginary part and 2 being the real part.
- Boolean (Bool): Python also supports Boolean (bool) data types (True or False) and NoneType (None) for null values.
2. Indentation
In Python, indentation is crucial for defining blocks of code. Unlike other programming languages that use curly braces {} or keywords, Python uses spaces or tabs to organize code. In Python introduction, you must be familiar with Python indentation to successfully execute your code.
Example of Indentation in a Conditional Statement:
| x = 5
if x > 0: # Start of a block print(“Positive number”) # Indented block else: print(“Negative number or zero”) # Indented block |
Rules for Indentation:
- Use consistent indentation throughout your code.
- Python recommends using 4 spaces for indentation.
- Mixing tabs and spaces can result in errors.
3. Control Statements
Control statements in Python languages allow you to direct the flow of execution based on conditions or iterations.
Conditional Statements
| num = 10
if num > 0: print(“Positive number”) elif num == 0: print(“Zero”) else: print(“Negative number”) |
For Loop: This loop is used to iterate over a sequence like a list, tuple, or range.
| for i in range(1, 6): # Iterates from 1 to 5
print(i) |
While Loop: This loop repeats as long as the condition comes out to be true. It stops when the condition evaluates to False.
| count = 0
while count < 5: print(count) count += 1 # Increment count |
4. Functions
Functions are reusable blocks of code designed to perform specific tasks. Functions in Python are defined using the “def” keyword. Whenever we are declaring a Python function we must use the def keyword and then start.
Defining and Calling a Function:
| def greet(name):
return f”Hello, {name}” # Return a formatted string message = greet(“Alice”) # Call the function with “Alice” print(message) # Output: Hello, Alice |
Key Features of Functions:
- Functions can accept parameters and return values. They can have default values for parameters.
- Functions can handle variable-length arguments using *args (positional) and **kwargs (keyword).
Python Introduction Examples
In this simple Python introduction example, we are going to ask users for their names and then print a welcome statement.
| # Basic Python Example
name = input(“Enter your name: “) print(f”Hello, {name}! Welcome to Python.”) |
Input: This keyword is used to accept the user’s input and save it inside the variable “name” . In Python we do not need to end a statement with a “;”
Output
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Python Introduction FAQ
Q1. What is Python Programming language?
Ans: Python is a high-level, interpreted programming language known for its simplicity, readability, and versatility.
Q2. Do we need to define the data type in Python?
Ans: Variables in Python are dynamically typed and hence we do not need to explicitly declare the type of data while writing codes. Python can recognise the data types itself.
Q3. Is Indentation important in Python introduction?
Ans: When you are new to python programming language getting familiar with python introduction and indentation is important to be able to execute your program.
Q4. What are Functions in Python Programming Language?
Ans: Functions are features of Python language which enables modularity, reusability, and organisations of Python programs. With the functions reusable block of code we can perform specific tasks for as many times we want. Python functions are defined with the “def” keyword.
