This site is mobile accessible. Press the "Tap Here" button to use a smaller font-size. Tap Here!

Smartphone icons created by Freepik - Flaticon

JS Functions

Setting a default value to a function parameter.

function myFunction(x, y) {
  if (y === undefined) {
    y = 0;
  }  
  return x * y;
}
document.getElementById("demo").innerHTML = myFunction(4);