'''
Purpose: quick refresher on Boolean calculations
'''
# The if statement is used for decision making.
# If (boolean expression/condition):
    # do this
# Elif (condition)
    # do this
# Else - doesn't need condition - anything else
    # do this

# determine whether its input pH level is acidic; i.e., less than 7.0

# acidity limit
ACIDIC_THRESHOLD = 7.0     # samples less than threshold are acidic

# get pH level of interst
reply = input( 'Enter pH level: ' ) # Get a pH number from the user
pH = float( reply ) # Convert the string of the user response into a float

print( )

# determine whether sample is acidic
is_acidic = ( pH < ACIDIC_THRESHOLD ) # The boolean value is_acidic is
# going to be either True or False depending on whether or not the
# pH balance is less than the acidic threshold, meaning it will be True
# if it's less and False if it's not

# print result
print( is_acidic ) # Will print True or False based on whether the number we put in is acidic or not

# all done