Pure function should qualify with if there is same input the output should be same no matter how many times it is called

pure_function_same_input_same_output.js

function addTwoNumber(num1,num2) {
  return num1 + num2;
}

addTwoNmber(3,4); // will return 7 no matter how many times is called

function multiplyWithCurrentTime(num) {
  return num * new Date().getTime();
}

multiplyWithCurrentTime(3);// will provide new output each time we call the funciton