Skip to main content
Contents Index
Search Book
Search Results:
No results.
Readability settings Prev Up Next Scratch ActiveCode Profile title here \(
\newcommand{\lt}{<}
\newcommand{\gt}{>}
\newcommand{\amp}{&}
\definecolor{fillinmathshade}{gray}{0.9}
\newcommand{\fillinmath}[1]{\mathchoice{\colorbox{fillinmathshade}{$\displaystyle \phantom{\,#1\,}$}}{\colorbox{fillinmathshade}{$\textstyle \phantom{\,#1\,}$}}{\colorbox{fillinmathshade}{$\scriptstyle \phantom{\,#1\,}$}}{\colorbox{fillinmathshade}{$\scriptscriptstyle\phantom{\,#1\,}$}}}
\)
Section 7.17 Write-code questions
Activity 7.17.1 .
Fix line 2 so that it prints “Hi” instead of “hi”.
Solution . “Hi”“hi”
s1 = "hi"
s1 = s1.capitalize()
print(s1)
The
capitalize() method returns a new string; it doesn’t modify the original because strings are immutable. As a result, you need to assign the value of s1.capitalize() to s1.
Activity 7.17.2 .
Write code to evaluate the length of the string “I like green eggs” and print it. It should print “The length is 17”.
Solution . “I like green eggs”“The length is 17”
sentence = 'I like green eggs'
print('The length is ' + str(len(sentence)))
You can use the
len() method to find the length of a string.
Activity 7.17.3 .
Take the following Python code that stores this string:
string = "X-DSPAM-Confidence: 0.8475". Use
find and string slicing to extract the portion of the string after the colon character and then use the
float function to convert the extracted string into a floating point number called
num.
Solution .
string = "X-DSPAM-Confidence: 0.8475"
colonpos = string.find(':')
digit = string[colonpos + 1:]
num = float(digit)
The
float() function ignores whitespace, so you can begin the slice at the space character after the colon or at the 0 – your choice!
Activity 7.17.4 .
Write a function
numDigits that will return the number of digits in an integer
n.
Solution .
def numDigits(n):
n_str = str(n)
return len(n_str)
# Check the function
print(numDigits(50))
print(numDigits(20000))
print(numDigits(1))
Convert the integer to a string, then use the
len() method.
Activity 7.17.5 .
Write a program that asks a user for their name and from the input prints the first letter of their name in lowercase.
Solution .
prompt = "What is your name?"
name = input(prompt)
first = name[0]
lowerFirst = first.lower()
print(lowerFirst)
Use the
input() function to get the user’s input, then use indexing and the
lower() method to print the first letter of their name in lowercase.
You have attempted
of
activities on this page.
