Read from and write to console in java, python 3, c++ and javascript

Here is how you can read user input and print to the console in each of the languages you mentioned:

Java:

import java.util.Scanner; 
public class Main { 
    public static void main(String[] args) { 
        Scanner scanner = new Scanner(System.in); 
        System.out.print("Enter a string: "); 
        String input = scanner.nextLine(); 
        System.out.println("You entered: " + input); 
    } 
}

Python 3:

input_string = input("Enter a string: ") 
print("You entered: " + input_string)

C++:

#include <iostream> 
#include <string> 
int main() { 
    std::cout << "Enter a string: "; 
    std::string input; 
    std::getline(std::cin, input); 
    std::cout << "You entered: " << input << std::endl; 
    return 0; 
}

JavaScript:

const readline = require('readline'); 
const rl = readline.createInterface({ 
    input: process.stdin, 
    output: process.stdout 
}); 
rl.question('Enter a string: ', (answer) => { 
    console.log(`You entered: ${answer}`); 
    rl.close(); 
});

I hope this helps! Let me know if you have any questions.