Checkpoints

#4.1
< , > , <= , >= , == , !=

#4.2
i = 1
j = 0
b1 = True
b2 = False

#4.3
random.randint(0, 19)

#4.4
random.randint(10, 19)

#4.5
random.randint(10, 50)

#4.6
random.randint(0, 1)

#4.7
if y >0:
    x = 1

#4.8
if score > 90:
  pay *= 1.03

#4.9
if score > 90:
  pay *= 1.03
eles:
  pay *= 1.01

#4.10
(a): is even.
     is odd.
(b): is odd.

#4.11
if x =3 and y =2 --> x is 3
if x =3 and y =4 --> z is 7
if x =2 and y =2 --> no output

#4.12
if x = 2 and y = 4 --> x is 2
if x = 3 and y = 2 --> no output
if x = 3 and y = 3 --> z is 6

#4.13
The conditions are tested in the wrong orders

#4.14
A and C are equivalent, but B and D are incorrectly indented.

#4.15
newLine = (count % 10 == 0)

#4.16
Both are correct. B is better
Both conditions in A are tested. In B the condition is tested only once.

#4.17
in code (a):
    if number = 14 --> 14 is even
    if number = 15 --> 15 is multiple of 5
    if number = 30 --> 30 is is even
                       30 is multiple of 5
in code (b):
    if number = 14 --> 14 is even
    if number = 15 --> 15 is multiple of 5
    if number = 30 --> 30 is is even

#4.18
yes

#4.19
Causes a runtime error, because tax will not be created.

#4.20
True and (3 > 4) --> False
not (x > 0) and (x > 0)  --> False
(x > 0) or (x < 0) --> True
(x != 0) or (x == 0) --> True
(x >= 0) or (x < 0) --> True
(x != 1) == not (x == 1)  --> True

#4.21
(num > 1) and (num < 100)

#4.22
((num > 1) and (num < 100)) or (num < 0)

#4.23
x >= y >= 0 --> False
x <= y >= 0 --> True
x != y == 5 --> True
(x != 0) or (x == 0) --> True

#4.24
Yes

#4.25
if ch = 'A' --> True
if ch = 'p' --> False
if ch = 'E' --> True
if ch = '5' --> False

#4.26
(x < y and y < z) is True
(x < y or y < z) is True
not (x < y) is False
(x < y < z) is True
not (x < y < z) is False

#4.27
age > 13 and age < 18

#4.28
weight > 50 or height > 160

#4.29
weight > 50 and height > 160

#4.30
(weight > 50 or height > 160) and not (weight > 50 and height > 160)

#4.31
Sorted

#4.32
(a)ticketPrice = 20 if ages >= 16 else 10
(b)print(count, end = "\n" if count % 10 == 0 else " ")

#4.33
(a) if x >10:
       score = 3 * scale
    else:
       score = 4 * scale
(b) if income > 10000:
        tax = income * 0.2
    else:
        tax = income * 0.17 + 1000
(c) if number % 3 == 0:
        print(i)
    else:
        print(j)

#4.34
The precedence order of the Boolean operators are not, and, or in this order.
True
True

#4.35
True

#4.36
False
False

#4.37
Is (x > 0 and x < 10) the same as ((x > 0) and (x < 10))? Yes
Is (x > 0 or x < 10) the same as ((x > 0) or (x < 10))? Yes
Is (x > 0 or x < 10 and y < 0) the same as (x > 0 or (x < 10 and y < 0))? yes