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Showing content from https://www.geeksforgeeks.org/python/output-python-programs-set-24-sets/ below:

Output of Python Programs | Set 24 (Sets)

Last Updated : 29 Dec, 2017

Prerequisite:

sets = {1, 2, 3, 4, 4}
print(sets)

1. {1, 2, 3}
2. {1, 2, 3, 4}
3. {1, 2, 3, 4, 4}
4. Error

Output:
2. {1, 2, 3, 4}

Duplicate values are not allowed in sets. Hence, the output of the code shown above will be a set containing the duplicate value only once. Hence output will be {1, 2, 3, 4}.

sets = {3, 4, 5}
sets.update([1, 2, 3])
print(sets)

1. {1, 2, 3, 4, 5}
2. {3, 4, 5, 1, 2, 3}
3. {1, 2, 3, 3, 4, 5}
4. Error

Output:
1. {1, 2, 3, 4, 5}

The method update adds elements to a set.

set1 = {1, 2, 3}
set2 = set1.copy()
set2.add(4)
print(set1)

1. {1, 2, 3, 4}
2. {1, 2, 3}
3. Invalid Syntax
4. Error

Output:
2. {1, 2, 3}

: In the above piece of code, set2 is barely a copy and not an alias of set1. Hence any change made in set2 isn’t reflected in set1.

set1 = {1, 2, 3}
set2 = set1.add(4)
print(set2)

1. {1, 2, 3, 4}
2. {1, 2, 3}
3. Invalid Syntax
4. None

Output:
4. None

method doesn't return anything. Hence there will be no output.

set1 = {1, 2, 3}
set2 = {4, 5, 6}
print(len(set1 + set2))

1. 3
2. 6
3. Unexpected
4. Error

Output:
4. Error

unsupported operand type(s) for +: 'set' and 'set'.

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