Set is a collection of unique values.
It can store values of any type.
Sets are very similar to Arrays.
One main difference between Sets and Arrays
is that a Set can only contain unique values.
Arrays can have duplicate elements.
In the example given above,
even though we pass an array with
two elements with the same value "apple",
to new Set(),
the set fruits only contains
one element with the value "apple".
The set retains the first "apple" element
and
ignores all other duplicates.