3.18. Additional Challenges — Software Engineering, Stage 6

Code challenge: Last Letter

Write a program which asks the user for a word and then displays the last letter.

Example 1
Enter a word: rainbow
w
Example 2
Enter a word: sunshine
e
Solution

Solution is locked

Code challenge: Fibonacci

The Fibonacci sequence is:

\(1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ...\)

The first two terms are defined to be:

\(F_1 = 1, F_2 = 1\)

With all remaining terms defined as:

\(F_n = F_{n-1} + F_{n-2}\)

Write a program which asks for a term \(n\), and then outputs the corresponding Fibonacci term \(F_n\).

Example

8 is the 6th term in the Fibonacci sequence.
Which term? 6
8
Solution

Solution is locked

Code challenge: Validate Password

For security reasons it’s good to have a strong password. Ideally we want passwords that:

Are 8 characters or more

Have at least one upper case and one lower case letter

Contain a number

Write a program that rates a user’s password based on the following rules.

If 0 criteria are met the password is weak

If 1 criterion is met the password is fair

If 2 criteria are met the password is strong

If all 3 criteria are met the password is very strong

Example 1: Password is weak because it’s less than 8 characters, only contains lower case characters and does not contain a number.
Enter password: secret
weak
Example 2: Password is strong because it contains more than 8 letters and a number, but does not contain an upper case character.
Enter password: n3v3rgu355
strong
Example 3: Password is fair because it contains more than 8 letters
Enter password: pyth@nprogramming
fair
Example 4: Password is very strong because it meets all 3 criteria
Enter password: tAn57a4Fl
very strong
Hint

You can use in to check whether a password contains a particular character.
password = 'secret'

print('a' in password) # False, since 'secret' doesn't contain the letter 'a'
print('s' in password) # True, since 'secret' contains the letter 's'
Solution

Solution is locked

Code challenge: Make A Mountain

Write a program that constructs a mountain out of *’s!

The program should read in integers from the user until the user enters a blank link. The program should then construct a mountain using the integers as mountain heights from left to right.

Example 1: The first column has 1 *, the second column has 2 *’s and the third column has 3 *’s
1
2
3

*
**
***
Example 2: Each column has 2, 2, 4, 3, 2 *’s respectively.
2
2
4
3
2

*
**
*****
*****
Example 3: Each column has 1, 2, 0, 1, 2, 4, 3, 3, 2, 3, 1 *’s respectively.
1
2
0
1
2
4
3
3
2
3
1

    *
    *** *
*  ******
** ********
Solution

Solution is locked

Additional Challenges

3.18. Additional Challenges#