Get user input and output from command line in NodeJs http://st-on-it.blogspot.com/2011/05/how-to-read-user-input-with-nodejs.html

ask.js

function ask(question, format, callback) {
 var stdin = process.stdin, stdout = process.stdout;
 
 stdin.resume();
 stdout.write(question + ": ");
 
 stdin.once('data', function(data) {
   data = data.toString().trim();
 
   if (format.test(data)) {
     callback(data);
   } else {
     stdout.write("It should match: "+ format +"\n");
     ask(question, format, callback);
   }
 });
}
 
ask("Name", /.+/, function(name) {
  ask("Email", /^.+@.+$/, function(email) {
    console.log("Your name is: ", name);
    console.log("Your email is:", email);
 
    process.exit();
  });
});