Reading value from console, interactively

you can't do a "while(done)" loop because that would require blocking on input, something node.js doesn't like to do.

Instead set up a callback to be called each time something is entered:

var stdin = process.openStdin();stdin.addListener("data", function(d) {    // note:  d is an object, and when converted to a string it will    // end with a linefeed.  so we (rather crudely) account for that      // with toString() and then trim()     console.log("you entered: [" +         d.toString().trim() + "]");  });

I've used another API for this purpose..

var readline = require('readline');var rl = readline.createInterface(process.stdin, process.stdout);rl.setPrompt('guess> ');rl.prompt();rl.on('line', function(line) {    if (line === "right") rl.close();    rl.prompt();}).on('close',function(){    process.exit(0);});

This allows to prompt in loop until the answer is right. Also it gives nice little console.You can find the details @ http://nodejs.org/api/readline.html#readline_example_tiny_cli

The Readline API has changed quite a bit since 12'. The doc's show a useful example to capture user input from a standard stream :

const readline = require('readline');const rl = readline.createInterface({  input: process.stdin,  output: process.stdout});rl.question('What do you think of Node.js? ', (answer) => {  console.log('Thank you for your valuable feedback:', answer);  rl.close();});

More information here.