![Hello World Program
C Language
// Your First C Program
#include <stdio.h>
int main() {
printf("Hello, World!");
return 0;
}
Java Language
// Your First Java Program
class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World!");
}
}
Python Language
#Your 1st Python Program
print(“Hello World”)](https://image.slidesharecdn.com/welcometopythonprogramming-220720045458-e8fe171d/85/Welcome-to-Python-Programming-pptx-6-320.jpg)
Welcome to Python Programming.pptx
- 1. Welcome to Python Programming Simple, Easy to learn and most demanded language across the world.
- 2. What is Python? •Python is an interpreted & high-level programming language. •Development started in the 1980’s by Guido van Rossum. • Only became popular in the last decade or so. • Python 3.x currently dominates, and Python 2.x is the past of Python. •Supports a multitude of programming paradigms. • OOP, functional, procedural, logic, structured, etc. • General purpose. • Very comprehensive standard library includes numeric modules, crypto services, OS interfaces, networking modules, GUI support, development tools, etc.
- 3. Why to Learn Python? Wait! I can do all these things using other programming languages too! Then why Python?
- 4. Impression •Easy to learn. • Supports quick development. • Cross-platform. • Open Source. • Extensible. • Embeddable. • Large standard library and active community. • Useful for a wide variety of applications.
- 5. How it Works? •Compiler or Interpreter? •The standard implementation of Python is interpreted. • The interpreter translates Python code into bytecode, and this bytecode is executed by the Python VM (similar to Java). • Two modes: normal and interactive. • Normal mode: entire .py files are provided to the interpreter. • Interactive mode: read-eval-print loop (REPL) executes statements piecewise.
- 6. Hello World Program C Language // Your First C Program #include <stdio.h> int main() { printf("Hello, World!"); return 0; } Java Language // Your First Java Program class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } } Python Language #Your 1st Python Program print(“Hello World”)
- 7. Which Version to follow? • F1: Division operator Eg. -7 / 5 • F2: I/O functions • F3: str type • F4: xrange() saves memory but doesn’t support slicing • F5: Error Handling try: trying_to_check_error except NameError, err: print err, 'Error Caused' # Would not work in Python 3.x • F6: modules Python 3.10.0b4 is available". 10 July 2021. BUT still the stable version is 3.9
- 8. 1. Python Shell: An interactive interpreter. It is pre available in Linux and Mac OS X 2. Script mode on cmd 3. IDE: Atom, IDLE , Jupyter, Spyder, etc. Find out more at the PowerPoint Getting Started Center Modes of running a Python Code .py Python Shell IDE Script mode
- 9. Some Fundamentals • Whitespace is significant in Python. Where other languages may use {} or (), Python uses indentation to denote code blocks. • Comments • Single-line comments denoted by #. • Multi-line comments begin and end with three “s. • Typically, multi-line comments are meant for documentation. • Comments should express information that cannot be expressed in code – do not restate code. # here’s a comment for i in range(0,3): print (i) def myfunc(): """here’s a comment about the myfunc function”””""" print(“I'm in a function!“)
- 10. Data Types & Operators in Python
- 11. Applications & Use Cases of Python
Editor's Notes
- #9: In Slide Show mode, click the arrow to enter the PowerPoint Getting Started Center.