CS21: Quiz 2 Study Sheet

In addition to all concepts from Quiz 1,

You should be able to define the following terms:

branching and looping
the Accumulator design pattern
data types: integer, float, string, boolean, list

You should understand and be able to use the following Python concepts:

basic arithmetic expressions using +, -, *, /, **, %
conversion between the int, float, and str types
reading in strings using raw_input()
the empty string ""
string concatenation with +, repetition with *
string and list indexing with []
string and list slicing with [:]
for loops over strings and lists
len()
tracing a program
if, if/else, if/elif/else
the relational operators <, <=, ==, >, >=, !=
the boolean operators and, or, and not
the random library functions: randrange(), choice()
nested statements (loop in a loop; loop in an if/else; etc)

Practice problems:

Programming exercises 1, 4, and 8 on page 228-229 of Zelle; excerise 10 on page 120
True/false questions 1, 2, 4, 7, 8 on pages 225-226 of Zelle; questions 1, 2, 3, and 4 on page 115
Multiple choice problems 2, 3, 5, 6, 7, 10 on pages 226-227 of Zelle.
Discussion question 1, parts (a) through (f) on page 116 of Zelle.

Trace the behavior of the following program:

  x = 3
  print 0,x
  for i in range(1,6):
      if x % 2 == 0:
          x = x / 2
      else:
          x = (3*x+1)/2
      print i,x