Catalog

• if - elif - else

if - elif - else

# Identity operator : is not is Judge the same object a and b a=4 b=4 id Memory address Whether the values are equal ==
# object is The values are equal ==
# The type of number age Conversion type Strong go 
age = int(input(' Please enter your age :'))
print(int(age),type(int(age)))
if age>=18:
print(' Allow you to enter the Internet bar ')
else:
print(' Go back to sleep ')
grade = 90
if grade >= 90:
print(' You are the best ')
elif grade >= 80:
print(" You are awesome ")
elif grade >= 70:
print(' come on. , Conduct oneself well ')
i = 0
while i <= 10:
print(i)
if i == 3:
continue
i += 1
# while Add... After the cycle else, When the loop is finished, it will execute else Code for , If the cycle stops in the middle , Don't print else
''' while Conditions ： Loop statement else: sentence '''
i = 1
while i <= 5:
print('hello world')
if i == 3:
break
i += 1
else:
print(' The loop ends ')