In [1]:

    

def if_test(num):
    if num > 100:
        print('100 < num')
    elif num > 50:
        print('50 < num <= 100')
    elif num > 0:
        print('0 < num <= 50')
    elif num == 0:
        print('num == 0')
    else:
        print('num < 0')


    

In [2]:

    

if_test(1000)


    

    




100 < num

In [3]:

    

if_test(70)


    

    




50 < num <= 100

In [4]:

    

if_test(0)


    

    




num == 0

In [5]:

    

if_test(-100)


    

    




num < 0

In [6]:

    

def if_test2(num):
    if 50 < num < 100:
        print('50 < num < 100')
    else:
        print('num <= 50 or num >= 100')


    

In [7]:

    

if_test2(70)


    

    




50 < num < 100

In [8]:

    

if_test2(0)


    

    




num <= 50 or num >= 100

In [9]:

    

def if_test_in(s):
    if 'a' in s:
        print('a is in string')
    else:
        print('a is NOT in string')


    

In [10]:

    

if_test_in('apple')


    

    




a is in string

In [11]:

    

if_test_in('melon')


    

    




a is NOT in string

In [12]:

    

if 10:
    print('True')


    

    




True

In [13]:

    

if [0, 1, 2]:
    print('True')


    

    




True

In [14]:

    

print(bool(10))


    

    




True

In [15]:

    

print(bool(0.0))


    

    




False

In [16]:

    

print(bool([]))


    

    




False

In [17]:

    

print(bool('False'))


    

    




True

In [18]:

    

def if_test_list(l):
    if l:
        print('list is NOT empty')
    else:
        print('list is empty')


    

In [19]:

    

if_test_list([0, 1, 2])


    

    




list is NOT empty

In [20]:

    

if_test_list([])


    

    




list is empty

In [21]:

    

def if_test_and_not(num):
    if num >= 0 and not num % 2 == 0:
        print('num is positive odd')
    else:
        print('num is NOT positive odd')


    

In [22]:

    

if_test_and_not(5)


    

    




num is positive odd

In [23]:

    

if_test_and_not(10)


    

    




num is NOT positive odd

In [24]:

    

if_test_and_not(-10)


    

    




num is NOT positive odd

In [25]:

    

def if_test_and_not_or(num):
    if num >= 0 and not num % 2 == 0 or num == -10:
        print('num is positive odd or -10')
    else:
        print('num is NOT positive odd or -10')


    

In [26]:

    

if_test_and_not_or(5)


    

    




num is positive odd or -10

In [27]:

    

if_test_and_not_or(10)


    

    




num is NOT positive odd or -10

In [28]:

    

if_test_and_not_or(-10)


    

    




num is positive odd or -10

In [29]:

    

def if_test_and_backslash(num):
    if num >= 0 \
       and not num % 2 == 0:
        print('num is positive odd')
    else:
        print('num is NOT positive odd')


    

In [30]:

    

if_test_and_backslash(5)


    

    




num is positive odd

In [31]:

    

def if_test_and_brackets(num):
    if (num >= 0
        and not num % 2 == 0):
        print('num is positive odd')
    else:
        print('num is NOT positive odd')


    

In [32]:

    

if_test_and_brackets(5)


    

    




num is positive odd