Coding in Python
              and
Elements of Discrete Mathematics

            Errata

p. 13, top picture:

    s += 1

  should be:

    s += k

p.18, 3rd paragraph:

    have specific functions in Python programs.

  should be:

    have specific meaning in Python programs.

p. 58, middle:

    1+4+9+36+49+64+81+100=385

  should be:

    1+4+9+25+36+49+64+81+100=385

p. 59, middle:

    optional argument reversed=True

  should be:

    optional argument reverse=True

p. 75, Question 10:

    if n % d is 0:

  should be:

    if n % d == 0:

p. 81, Question 2:

    return x is y # or return x == y

  should be:

    return x == y

p. 121, Question 4:

    int(17.0 / n * n) is not 17.0

  should be:

    int(17.0 / n * n) != 17.0

p. 141, table of relational operators:

    is       equal; same as ==

    is not   not equal; same as !=

  should be:

    is       is the same object

    is not   is not the same object

  Use == and != when comparing values; use "is" or "is not" when you want to
  verify that variables refer to the same object.

  Starting with release 3.8, Python may generate a warning or a syntax error when "is"
  is used with literals. For example:

  >>> x = 'A'
  >>> x is 'A'
  True
  >>> if x is 'A': print('A-OK')
  SyntaxError: "is" with a literal. Did you mean "=="?

  It is OK to use "is" or "is not" with None, because there is only one
  instance of None.

p. 143, code in the right column near the bottom:

    : is missing in "else"

p. 218, Question 7:

    3*0 + 7 + 3*2 + 0 + 3*4 + 3 + 1 + 3*0 + 0 + 3*0 + 1 + 3*8 + 7 = 60

  should be:

    3*0 + 7 + 3*2 + 0 + 3*4 + 3 + 3*0 + 0 + 3*0 + 1 + 3*8 + 7 = 60


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