COSC 235B David A. Sykes
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Quiz #4
November 3, 2006
Name: Pledged:
Answer all questions. Write legibly.
1. Show the result of each of the following statements:
print 2 > 1 or 1 < 0
print 2 > 1 and 1 < 0
print not True
2. Show the output of the following code segment:
s = "Don't forget to *, y'all!"
i = 0
while s[i] != '*':
i = i + 1;
print s[0:i] + "VOTE" + s[i+1:]
3. Write a while loop that completes the definition of log2(n). The function calculates the number of
times a whole number n can be divided by 2 (using integer division) until the result reaches 1. For
example, log2(16) is 4 since 16 / 2 / 2 / 2 / 2 == 1. log2(23) is also 4 because 23 / 2 / 2 /
2 / 2. And log2(1) is 0. Hint: Use variable result as an accumulator to count the number of
divisions by 2.
def log2(n):
result = 0
return result