'''
Purpose: quick refresher on Boolean calculations
'''

# 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: ' )
pH = float( reply ) # We make the string input a float
# so that we can convert strings of floats into floats

print( )

# Reminder that True/False are boolean values in Python.
# Logical expressions using relation operators (check out can_you_relate.py)
# give you either the value True or the value False!

# determine whether sample is acidic
is_acidic = ( pH < ACIDIC_THRESHOLD ) # gives you True/False
# 7 (pH entered) is not less than 7 (ACIDIC_THRESHOLD) -> False
# 6 (pH entered) < 7 (ACIDIC_THRESHOLD) -> True (acidic!)
# 12 (pH entered)< 7 (ACIDIC_THRESHOLD) -> False (not acidic!)
# We can print "basic" for basic PHs and "acidic" for acidic PHs
# butttt we will need an if statement... sooo wait like 5 mins. :)

# print result
print( is_acidic ) 

# all done