var readline = require('readline');
var rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
rl.question("What do you think of node.js? ", function(answer) {
// TODO: Log the answer in a database
console.log("Thank you for your valuable feedback:", answer);
rl.close();
});
as taken from here http://nodejs.org/api/readline.html#readline_readline
More specifically, stuff this code into an app.js file, then run the following command
node app.js
And answer the question above.
What happens? the require statement exposes the public methods of the 'readline' module, one of which is 'createInterface' method. This method takes input and output as options.
From the looks of it, different sources of input and output can be specified, but in this case, you are using the 'stdin' and 'stdout' properties of the global node 'process' variable. These specify input and out to and from the console.
Next you call the question method of the readline object you've created and specify a callback function to display the user input back to user. 'close' is called on readline to release control back to the caller.