Hello World

The "Hello World" program is typically the first program that beginners write when learning a new programming language. It is a simple program that prints the phrase "Hello, World!" to the console.

Task

Create a program that prompts the user to enter their name, and then prints a greeting message "Hello, xx!" using that name.

JavaScript implementation

hello.js

const readline = require('readline');

const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

rl.question('Enter your name: ', (answer) => {
  console.log(`Hello, ${answer}!`);
  rl.close();
});

Run the above example code by executing the command node hello.js in the terminal.

Python implementation

hello.py

name = input("Enter your name: ")
print(f"Hello, {name}!")

Run the above example code by executing the command python hello.py in the terminal.

Code Highlight

• In Python, use the input() function to get user input, whereas in JavaScript, use the readline series of APIs.
• In Python, use f"..." for string interpolation, whereas in JavaScript, use backticks (`).
• In Python, use the print() function to display output to the console, whereas in JavaScript, use console.log() function.

Difference Quick View

Feature	JavaScript	Python
File extension	.js	.py
Execution command	node filename.js	python filename.py
Printing	console.log()	print()
Comments	// comment or /** comment */	# comment or """ comment """

Resources

• https://docs.python.org/3/library/functions.html#print