The If-Else statement is the most basic of all the control flow statements. It tells your program to execute a certain section of code only if a particular condition evaluates to true.
e.g.
mood = input("how are you(good or bad)").lower()
if(mood == "good") or (mood == "g"):
print("Glad to hear")
elif(mood == "bad") or (mood == "b"):
print("Cheer up")
else:
print("answer me now")
conditional statements: statements that give the user options and interactivity
.lower()=automatically changes it to a lower case value
e.g.
mood = input("how are you(good or bad)").lower()
.upper()=changes it to upper case\
e.g.
mood = input("how are you(good or bad)").upper()
lists=used to store things in python
Declaring lists in python= e.g.
cars=["off road","sport","muscle","Hybrids"]
Using the list=for first one you have to 0 and then 1 then 2 then 3 etc.
Calling the list=In order to call you must call it by it's index number
e.g.
cars=["off road","sport cars","muscle cars","Hybrids"]
cars[1]
this is calling sport cars
[random.randint()]=calls random things from list e.g.
cars=["off road","sport cars","muscle cars","Hybrids"]
print(cars[random.randint(0,3)])
For loops: extremmly popular and often used to loop through lists; or through a range
e.g.
cars=["off road","sport cars","muscle cars","Hybrids"]
for name in cars:
print("the types of cars are:"cars)
range()=used to tell how many times the loop repeats
while loops: a types of loop that directs it true or false
decremeter: used to edit a variable
e.g.
10_car_garages=10
while 10_car_garages > 0:
10_car_garages = 10_car_garages - 1
time class= used to add a delay
time.sleep=used to sleep
e.g.
10_car_garages=10
while 10_car_garages > 0:
10_car_garages = 10_car_garages - 1
time.sleep(1)
sleeps for 1 second
maxLengthList=maxium number of things on a list
e.g. maxLengthList = 10
len()=the length of a compared variable
e.g.
cars = []
maxLengthList = 10
while len(cars) < maxLenghtList:
item = input("choose a car")
print(cars)
break=break the loop
item= enters an item to a list
append()=The method append() appends(add something in an end of a written document) a passed obj into the existing list.
e.g. cars.append(item)
fuction syntax:
def fuctionname (parameters):
[fuction body]
return[experesion]
e.g.
def cars(types):
print("Play game?")
print("the game has crashed")

	Criado por yomum 21 aproximadamente 8 anos atrás

nothing programming tech rocket (Python) Notas sobre Python chapter 2/part 2, criado por yomum 21 em 20-07-2016.