N
>>> str = "Messi is the best soccer player"
>>> "soccer" in str
True
>>> "football" in str
False
N
if "blah" not in somestring:
continue
N
string = "My favourite programming language is Python"
substring = "Python"
if substring in string:
print("Python is my favorite language")
elif substring not in string:
print("Python is not my favourite language")