Sets: What Does This Print

What does this print? · Intermediate · about 8 min

Read each short program and type exactly what it prints, with each printed line on its own line. If a program stops with an error, type the error's name, like TypeError.

Example

print(3 in {1, 2, 3})

prints

True

Program 1
```
s = {3, 1, 3, 2, 1}
print(len(s))
```
What it prints

Program 2

s = {1, 2, 3}
s.add(2)
s.add(4)
print(sorted(s))

What it prints

Program 3

a = {1, 2, 3}
b = {2, 3, 4}
print(sorted(a & b), sorted(a | b))

What it prints

Program 4

a = {1, 2, 3}
b = {2, 3, 4}
print(sorted(a - b), sorted(b - a))

What it prints

Program 5
```
s = {}
print(type(s))
```
What it prints

Program 6

s = {1, 2}
s.discard(5)
s.remove(5)
print(len(s))

What it prints

Program 7

print({1, 2} <= {1, 2, 3}, {1, 2} == {2, 1})

What it prints

Program 8

s = set("hello")
print(len(s), "l" in s)

What it prints