''' Purpose: introduce the logical operators
'''

print()

print( '##### Logical values (bool)' )

print()

print( True )
print( False )

a = True
b = False

print(); input( 'Enter when ready: ' ); print()

print( '##### Logical and' )

print()

# GENERAL RULE:
# When it comes to and, the minute you have at least one False, the whole thing is False.
# With and, it is only true when both values are True!

and1 = ( a and a ) # True and True is True
and2 = ( a and b ) # True and False is False
and3 = ( b and a ) # False and True is False
and4 = ( b and b ) # False and False is False

print( a, 'and', a, '=',  and1 )
print( a, 'and', b, '=',  and2 )
print( b, 'and', a, '=',  and3 )
print( b, 'and', b, '=',  and4 )

print(); input( 'Enter when ready: ' ); print()

print()

print( '##### Logical or' )

print()

# GENERAL RULE:
# When it comes to and, if you have at least one True, the whole thing is True.
# If you have both be False, then it is False. Because both values being false means that neither value is True so the output cannot be True!

or1 = ( a or a ) # True or True is True
or2 = ( a or b ) # True of False is True
or3 = ( b or a ) # False or True is True
or4 = ( b or b ) # False and False is False

print( a, 'or', a, '=',  or1 )
print( a, 'or', b, '=',  or2 )
print( b, 'or', a, '=',  or3 )
print( b, 'or', b, '=',  or4 )

print(); input( 'Enter when ready: ' ); print()

print( '##### Logical negation' )

print()
# Not something will be the opposite of whatever the boolean is

negate1 = ( not a ) # Not True is False
negate2 = ( not b ) # Not False is True

print( 'not', a, '=',  negate1 )
print( 'not', b, '=',  negate2 )

print()