'''
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
# this is all in caps because it is a constant value. it will never change throughout our code

# get pH level of interst
reply = input( 'Enter pH level: ' )
pH = float( reply ) # converts the pH value to a decimal (float) value
# python cannot represent infinite digits, so this number will be an approximation
# if you write 6.99999999 and put enough 9s, it might end up rounding the number
# the takeaway from this is to take caution when working with floats in python and to not put 20 decimal places
print( )

# determine whether sample is acidic
is_acidic = ( pH < ACIDIC_THRESHOLD ) # this is a comparison, so is_acidic is going to be a boolean value or True or False

# print result
print( is_acidic ) 

# all done