Nilai parameter default dalam javascript

// Default Parameter Values in javascript
// Longhand:
function volume(l, w, h) {
    if (w === undefined)
      w = 3;
    if (h === undefined)
      h = 4;
    return l * w * h;
  }
console.log(volume(2)); //output: 24
  
// Shorthand:
volume_ = (l, w = 3, h = 4 ) => (l * w * h);
console.log(volume_(2)) //output: 24
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