Python: Search Lists and Strings with the "in" Operator

result1 = 1 in [1, 2, 3]
result2 = 5 in [1, 2, 3]

result3 = 1 not in [1, 2, 3]
result4 = 5 not in [1, 2, 3]

result5 = "j" in "python"
result6 = "y" in "python"
result7 = "y" not in "python"

print(result1)  # True
print(result2)  # False
print(result3)  # False
print(result4)  # True
print(result5)  # False
print(result6)  # True
print(result7)  # False

Output

result1: Is 1 in [1, 2, 3]? → Yes → True
result2: Is 5 in [1, 2, 3]? → No → False
not in is simply the opposite
Strings work just like lists
result5: Is “j” in “python”? → No → False