How come obj[checkProp] works but obj.checkProp doesn't?

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**

function checkObj(obj, checkProp) {
// Only change code below this line

if(obj.hasOwnProperty(checkProp)){
  return obj.checkProp;
  
} else {
return "Not Found";
}

// Only change code above this line
}
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.36

Challenge: Testing Objects for Properties

Link to the challenge:

Dot notation only works with the exact literal name of the property, not with variables holding the name of the property.

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