If

cars = ['audi', 'bmw', 'subaru', 'toyota']
for car in cars:
if car == 'bmw' :
print(car.upper())
else:
print(car.title())

> < >= <= () and or

age1 = 21
age2 = 65
if age1 >= 18 and age1 < 30:
print("age1 is " + str(age1) + ", so young people!")
if (age2 < 12) or (age2 >= 60):
print("age2 is " + str(age2) + ", child or old")

In

if ('audi' in cars):
print("audi is in cars")
if ('ddd' in cars):
print("ddd is in cars")

Not in

if ('ddd' not in cars):
print("ddd is't in cars")

else & elif

age1 = 15
if age1 < 4:
print("111")
elif age1 < 10:
print("222")
elif age1 < 18:
print("222")
else:
print("...")

List is null

list = []
if list:
for car in list:
print(car.upper())
else:
print("list is null")

##############################

Audi

BMW

Subaru

Toyota

age1 is 21, so young people!

age2 is 65, child or old

audi is in cars

ddd is't in cars

222

list is null

##############################