x = "012345"
s = x[0:3]       # s contains "012"
s = x[:3]        # same thing (using default)
s = x[4:]        # s contains "45"
s = x[1:4]       # s contains "123"
s = x[-5:-2]     # same thing using negative indices
s = x[-2:99]     # s contains "45" - negative index from end of
                 # string allowed, as is index outside string (99)
s = x[::2]       # s contains "024"
s = x[1::2]      # s contains "135"
s = x[1:4:2]     # s contains "13"
s = x[1:5:2]     # s contains "13"
s = x[1:6:2]     # s contains "135"
s = x[-1::-2]    # s contains "531"
s = x[::-2]      # same thing (using default)
s = x[::-1]      # s contains "543210" (i.e. string reverse)
s = x[::0]       # "ValueError: slice step cannot be zero"