Object.keys( )

function countNumberOfKeys(obj) {

return Object.keys(obj).length;

//return number of properties the given obj has using Object.keys( )

}

function countNumberOfKeys(obj){

var count = 0;

// if there are no keys, then it will automatically start at 0 and return count at 0

for (let key in obj){

count++;

}

return count;

}