'''
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 )

print( )

# determine whether sample is acidic
# Logical expression using relational operator < (less than) evaluates to True/False
is_acidic = ( pH < ACIDIC_THRESHOLD )   # is_acidic will be a boolean (store True/False)

# If pH we entered was 4, we would compare (4.0 < 7.0) and that evaluates to True
# True is stored in is_acidic since a pH less than 7.0 is acidic

# print result
print( is_acidic ) 

# all done