truthy.js

var checkTruthyness = function(value) {
  if(value) {
    console.log(String(value) + " is truthy");
  }
  else {
    console.log(String(value) + " is falsey");
  }
}


checkTruthyness(true);
checkTruthyness(false);
checkTruthyness("Yolo");
checkTruthyness(10);
checkTruthyness(0);
checkTruthyness(-10);
checkTruthyness(null);