Ask the user to enter a number and check if the input is 'POSITIVE', 'ZERO', 'NEGATIVE'
def is_positive():
# input() returns str
user_input() = input("Please enter a number: ")
# cast input into int -> int()
n = int(user_input)
# check conditions
if n > 0:
print("POSITIVE")
elif n == 0:
print("ZERO")
else:
print("NEGATIVE")