''' Purpose: introduce relational operators
'''

#  get two numbers from user

print()

sa = input( 'Enter number: ' )
sb = input( 'Enter number: ' )

print()

# convert inputs to integer

a = int( sa )
b = int( sb )

#  compare and record results

b1 = ( a < b )     # < is less than
b2 = ( a > b )     # > is greater than

b3 = ( a <= b )    # <= is less than or equal to
b4 = ( a >= b )    # >= is greater than or equal to
# has to be >=, cannot be => , python does not recognize that. we say less than or equal, not equal or less than

b5 = ( a == b )    # == is equals
b6 = ( a != b )    # != is not equals
# what is handed back from these operators? -> True or False
    # True and False are kind of like keywords, they aren't strings, or numbers, or lists, or anything that we've seen
    # these are literal values, and they are special logical or bool (boolean) values of True and False
        # note: python is built on C++, which is built on C. weird behavior is inherited:
            # numbers: anything but 0 is True ( 0 is false )
            # strings: anything but "" is True ( if Rachel has her facts straight )
# these operators work on strings and numbers. strings do alphabetical comparison, similar to max() and min()
# sometimes the operators work on lists but let's not worry about that for now
# True and False are opposites.

#  display results

print( a, '< ', b, ':', b1 )
print( a, '> ', b, ':', b2 )

print()

print( a, '<=', b, ':', b3 )
print( a, '>=', b, ':', b4 )

print()

print( a, '==', b, ':', b5 )
print( a, '!=', b, ':', b6 )

print()