Can anyone explain this code (function) please ?

Question

Can anyone please explain this code(function)
void Removeduplicate(int arr[],int n)
{
unordered_map<int,bool> mp; int i;
/*// if(mp.empty())
// { // cout<<"How it's working with empty map elemnts !"<<endl;
// } */
for(i = 0; i < n; i++)
{
if(mp.find(arr[i]) == mp.end())
{
cout<<arr[i]<<' ';
}
mp[arr[i]] = true;
}
cout<<endl;
}

Answer 1

The function accepts an array and the array length. It creates an unordered_map object and then it iterates the array, checking whether array element at index i-th has been mapped as key for an item in the unordered_map.
When an array element isn't mapped as an item in the unordered_map, that element will be printed on screen.
An item will be created in the unordered_map using each array element as key, and a boolean true as value.