# What are data types and Operators

# Boolean gives us the outcome in True or False
# a = True
# b = False
#
# print(a == b)
# print(a != b)
# print(a >= b)

greetings = "Hello World!"

print(greetings.isalpha())
# checks if all  letters in our string are letters

# how can we check if the string is lower case
print(greetings.islower())

print(greetings.startswith("H"))

print(greetings.endswith("!"))

print(input("test").isalpha())
# None

print(bool(None))