text: // must install readline-sync package via npm
  // https://www.npmjs.com/package/readline-sync
  // on terminal: $ npm i readline-sync
  const readline = require('readline-sync');
  
  var name = readline.question('May I have your name? ');
  console.log('Hi there ' + name + '!');
  
  var num1 = readline.question("Enter a number between 1 and 20: ");
  console.log("Type of num1 is %s", typeof(num1));
  var num2 = Number(num1) ** 2;
  console.log("Squared of %s = %s", num1, num2);
  
  if (readline.keyInYN('Do you want this module?')) {
      // 'Y' key was pressed.
      console.log('Installing now...');
      // Do something...
  } else {
  // Another key was pressed.
  console.log('Searching another...');
  // Do something...
  }
  
  
  animals = ['Lion', 'Elephant', 'Crocodile', 'Giraffe', 'Hippo'];
  index = readline.keyInSelect(animals, 'Which animal?');
  //console.log(index)
  if (index === -1)
      console.log('Cancelling...')
  else
      console.log('Ok, ' + animals[index] + ' goes to your room.');
  
  