Starting Out with Python (3rd Edition)
3rd Edition
ISBN: 9780133582734
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 4TF
The repetition operator (*) works with strings as well as with lists.
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The IT director opened the department staff meeting today by saying, "I've got some good news and
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2. Signed Integers
Unsigned binary numbers work for natural numbers, but many calculations use negative
numbers as well. To deal with this, a number of different methods have been used to represent
signed numbers, but we will focus on two's complement, as it is the standard solution for
representing signed integers.
2.1 Two's complement
• Most significant bit has a negative value, all others are positive. So, the value of an n-digit
-2
two's complement number can be written as: Σ2 2¹ di 2n-1 dn
• Otherwise exactly the same as unsigned integers.
i=0
-
• A neat trick for flipping the sign of a two's complement number: flip all the bits (0 becomes 1,
or 1 becomes 0) and then add 1 to the least significant bit.
• Addition is exactly the same as with an unsigned number.
2.2 Exercises
For questions 1-3, answer each one for the case of a two's complement number and an
unsigned number, indicating if it cannot be answered with a specific representation.
1. (15 pts) What is the largest integer…
Chapter 8 Solutions
Starting Out with Python (3rd Edition)
Ch. 8.1 - Assume the variable name references a string....Ch. 8.1 - What is the index of the first character in a...Ch. 8.1 - If a string has 10 characters, what is the index...Ch. 8.1 - Prob. 4CPCh. 8.1 - Prob. 5CPCh. 8.1 - Prob. 6CPCh. 8.2 - Prob. 7CPCh. 8.2 - Prob. 8CPCh. 8.2 - Prob. 9CPCh. 8.2 - What will the following code display? mystring =...
Ch. 8.3 - Prob. 11CPCh. 8.3 - Prob. 12CPCh. 8.3 - Write an if statement that displays Digit" if the...Ch. 8.3 - What is the output of the following code? ch = 'a'...Ch. 8.3 - Write a loop that asks the user Do you want to...Ch. 8.3 - Prob. 16CPCh. 8.3 - Write a loop that counts the number of uppercase...Ch. 8.3 - Assume the following statement appears in a...Ch. 8.3 - Assume the following statement appears in a...Ch. 8 - This is the first index in a string. a. 1 b. 1 c....Ch. 8 - This is the last index in a string. a. 1 b. 99 c....Ch. 8 - This will happen if you try to use an index that...Ch. 8 - This function returns the length of a string. a....Ch. 8 - This string method returns a copy of the string...Ch. 8 - This string method returns the lowest index in the...Ch. 8 - This operator determines whether one string is...Ch. 8 - This string method returns true if a string...Ch. 8 - This string method returns true if a string...Ch. 8 - This string method returns a copy of the string...Ch. 8 - Once a string is created, it cannot be changed.Ch. 8 - You can use the for loop to iterate over the...Ch. 8 - The isupper method converts a string to all...Ch. 8 - The repetition operator () works with strings as...Ch. 8 - Prob. 5TFCh. 8 - What does the following code display? mystr =...Ch. 8 - What does the following code display? mystr =...Ch. 8 - What will the following code display? mystring =...Ch. 8 - Prob. 4SACh. 8 - What does the following code display? name = 'joe'...Ch. 8 - Assume choice references a string. The following...Ch. 8 - Write a loop that counts the number of space...Ch. 8 - Write a loop that counts the number of digits that...Ch. 8 - Write a loop that counts the number of lowercase...Ch. 8 - Write a function that accepts a string as an...Ch. 8 - Prob. 6AWCh. 8 - Write a function that accepts a string as an...Ch. 8 - Assume mystrinc references a string. Write a...Ch. 8 - Assume mystring references a string. Write a...Ch. 8 - Look at the following statement: mystring =...Ch. 8 - Initials Write a program that gets a string...Ch. 8 - Sum of Digits in a String Write a program that...Ch. 8 - Date Printer Write a program that reads a string...Ch. 8 - Prob. 4PECh. 8 - Alphabetic Telephone Number Translator Many...Ch. 8 - Average Number of Words If you have downloaded the...Ch. 8 - If you have downloaded the source code you will...Ch. 8 - Sentence Capitalizer Write a program with a...Ch. 8 - Prob. 9PECh. 8 - Prob. 10PECh. 8 - Word Separator Write a program that accepts as...Ch. 8 - Pig Latin Write a program that accepts a sentence...
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