Given listA = [1,2,3,4,5,5,6,6,7,7,7,8,8,8,8] What will be the output of print(set(listA))?

The output will be {1, 2, 3, 4, 5, 6, 7, 8}.

Here's the step by step explanation:

1. The set() function in Python is used to convert any of the iterable to sequence of iterable elements with distinct elements, commonly called Set.

2. When set() function is called with listA as argument, it converts the list into a set and removes all the duplicate elements.

3. The listA has duplicate elements like 5, 6, 7 and 8.

4. After removing these duplicates, we are left with unique elements - 1, 2, 3, 4, 5, 6, 7, 8.

5. So, when you print the set, it will output these unique elements.

6. The order of elements in a set is undefined and is unchangeable. But it will always print the unique elements.

So, the output of print(set(listA)) will be {1, 2, 3, 4, 5, 6, 7, 8}.