# 5.26. Functions and Conditionals Multiple Choice Questions¶

- if (x = y):
- Try again! An if statement shouldn't contain an assignment operator.
- if (x == y):
- Correct!
- if !(x is not y):
- Try again! The not operator (!) can't be used in python.
- if x = y:
- Try again! An if statement shouldn't contain an assignment operator.
- if x == y:
- Correct!

p9-1: Which of following uses the correct syntax for a python if statement?

- z >= 5**4 > y
- Correct! Note that compound statements are allowed in python.
- 5**4 > y and (5**4 < z or 5**4 == z)
- Correct! Note that the and operator comes before the or operator in operator precedence.
- 5**4 > y and <= z
- Try again! Nothing is being compared to z.
- 5**4 > y and 5**4 < z or 5**4 == z
- Try again! The and operator comes before the or operator in operator precedence.
- 5**4 > y and z >= 5**4
- Correct! Note that z >= 5**4 is the same as 5**4 <= z.

p9-2: Which of the following tests if `5 exponentiated to the 4th power`

is greater than `y`

and less than or equal to `z`

?

- if days / 365 == 16 or 16 < days / 365:
- Correct! Note that (16 < days / 365) is the same as (days / 365 > 16).
- if (days / 365 = 16) or (16 < days / 365):
- Try again! The assignment operator (=) should not be in the if statement.
- if days / 365 >= 16:
- Correct!
- if 365 / days >= 16:
- Try again! To convert days to age, you divide days by 365.
- if (days / 365 == 16) and (days / 365 > 16):
- Try again! One's age can't be 16 and greater than 16.

p9-3: Which of the following statements completes the function and returns `True`

if one’s age is greater than or equal to 16?

```
def days_to_age(days):
# what line goes here?
return True
else:
return False
```

- (((10 > y) or (x + y == 10)) and (x is not y))
- Try again! The precedence of the operators is incorrect.
- (10 > (y or x) + y == (10 and x) is not y)
- Try again! The precedence of the operators is incorrect.
- (10 > y or x + y == 10 and x is not y)
- Try again! The precedence of the operators is incorrect.
- ((10 > y) or (((x + y) == 10) and (x is not y)))
- Correct! Parentheses should be added in the following order: (x + y), (x is not y), (10 > y), ((x + y) == 10), (((x + y) == 10) and (x is not y)), ((10 > y) or (((x + y) == 10) and (x is not y))).
- (((10 > y) or ((x + y) == 10)) and (x is not y))
- Try again! The precedence of the operators is incorrect.

p9-4: Which of the following properly expresses the precedence of operators (using parentheses) in the following expression: 10 > y or x + y == 10 and x is not y? Might be best to try on paper first.

- LETTERS DON'T MATCH. Done. oo Done. i Done.
- Try again! LETTERS DON'T MATCH shouldn't be all uppercase, oo should be all uppercase, and i is missing characters.
- EEN. Done. OO Done. ins Done.
- Try again! EEN is incorrect.
- Letters don't match. Done. OO Done. ins Done.
- Correct!
- Letters don't match. OO ins Done.
- Try again! "Done." is missing twice.
- RE OO in Done.
- Try again! RE is incorrect, "Done." is missing twice, and in is missing a character.

p9-5: What would be the outputs for `transform_string('green')`

, `transform_string('door')`

, and `transform_string('mountains')`

in order? (Note: Ignore whitespaces.)

```
def transform_string(word):
if len(word) <= 5:
new_letters = word[1:3].upper()
if new_letters[0] == new_letters[1]:
print(new_letters)
else:
print("Letters don't match.")
else:
new_chars = word[-3:]
print(new_chars)
print('Done.')
```

You have attempted of activities on this page