demo.js

/** Output some stuff **/
console.log("Hello evil world!");

/** A for loop **/
let total = 0;
for(let i = 0; i < 10; i++){
  total += i;
}
console.log(total);

/** A while **/
total = 0;
while(total <= 10){
  total += 1;
}
console.log(total);

/** Function callin **/
function isEven(num){
  return num > 0 && num % 2 == 0;
}

console.log("173 is " + (isEven(173) ? " even " : "odd"));