Since the set is an unordered dataset, we cannot access the elements by index as the elements do not have an index. But we can check for the presence of an element in the set. To do so, we need to use the keyword `in`.
It is very convenient to use the keyword `in` in conjunction with a **for loop**. Let's look at an example.

set_1 = {"green", "red", "white", "blue", "black"}

for i in set_1:
    print(i)

set_ = {"green", "red", "white", "blue", "black"}

print("red" in set_)
print("yellow" in set_)


What is a list?\nA list is a collection that is ordered and changeable. Moreover, this collection allows duplicate elements.

What is a dictionary?\nA dictionary is an ordered and changeable collection with no duplicate members.\n\nA dictionary holds `key:value` pairs. \n\nKey-value is provided in the dictionary to make it more optimized. 

What is a tuple?\nA tuple is a collection that is ordered and unchangeable. This collection allows duplicate elements.\nA tuple is a collection that is very similar to a list. The sequence of values stored in a tuple can be of any type, and they are indexed by integers. Values of a tuple are syntactically separated by ‘commas’. Although it is not necessary, it is more common to define a tuple by closing the sequence of values in parentheses. This helps to understand the Python tuples more easily.

What is a set?\nIn Python, a `set` is an `unordered collection` of data type that is `iterable`, `mutable` and has `no duplicate elements`. The order of elements in a set is undefined, though it may consist of various elements.\n\nThe major advantage of using a set as opposed to a list is that it has a highly optimized method for checking whether a specific element is contained in the set.