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okay so so far weve talked about adding properties to an object right we have different ways of creating an object with certain properties now what if you want to remove it lets say lets take this example of a person object have the first name in the last name of course I have a middle name which is null and the age which is 25 because thats how old I am no but lets say we have ages 25 and now I dont want the age to show up in my object because I dont like the value 25 all as age property on my object I want to remove it okay how do I remove a property from an object consider if I do something like this lets say say personal age equals undefined okay as you might do this now what are the implications of doing something like this now lets say after I do this I access person dot age what would be the value we will be undefined so this is perfect right so this is exactly what we want if the object did not have the age property personal age would have been undefined now the object