JS Callbacks

gistfile1.js

var printFullName = function(fullName) {
  console.log(fullName);
};

printFullName('Grace Hopper');

var createFullNameAndPrintIt = function(first, last, callback){
  var fullName = first + ' ' + last;
  callback(fullName);
};

createFullNameAndPrintIt('Grace', 'Hopper', printFullName);

createFullNameAndPrintIt('Grace', 'Hopper', function(fullName){
  console.log('Commander ' + fullName);
});