Help plis

Question

1. def is_even(x):
2. if x == 0:
3. return True
4. else:
5.return is_odd(x-1)

6. def is_odd(x):
7. return not is_even(x)

print(is_odd(17))
print(is_even(23))
here what is return not in line 7

Answer 1

not is a keyword in Python that negates a boolean value, usually is ! in other languages e.g. !true is false