Using Function Expressions in JavaScript

gistfile1.txt

// Using a function expression, I can assign different values to a variable conditionally.

var day = 'Friday';

if (day === 'Friday') {
  var myGreeting = function () {
    return "Happy Friday!";
  }
}
else {
  var myGreeting = function () {
    return "Good morning!";
  }
}

console.log(myGreeting());    // Logs "Happy Friday!".