循环

• while  break：

count = 0
while True:
    count +=1#count = count + 1
    print(count)
    if count == 100:
        break

• while 条件

while count < 3 :   #注意这里需要：

    guest_age = int(input("guess age:"))
    if guest_age == age_of_oldboy :
        print("yes! you got it")
        break   #跳出循环
    elif guest_age > age_of_oldboy :
        print("you guess too bigger")
    else:
        print("you guess too small")
    count +=1 #count = count + 1

• while  else

格式:

while 条件:
    print()
else:
    print()

while count < 3 :   #注意这里需要：

    guest_age = int(input("guess age:"))
    if guest_age == age_of_oldboy :
        print("yes! you got it")
        break   #跳出循环
    elif guest_age > age_of_oldboy :
        print("you guess too bigger")
    else:
        print("you guess too small")
    count +=1 #count = count + 1
else:
    print("you guess too much !Fuck !")

•  for循环

for i in range(10):#相当于for i in range(0,10.1)，意思是从0开始，数10个，间隔为1
    print(i)
for i in range(0,10,2):#10为i从0开始数10次，2为间隔多少打印，这里为间隔2
    print(i)

• for else

for i in range(3):

    guess_age = int(input("guess age:"))
    if guess_age == age_of_oldboy:
        print("yes! you got it")
        break
    elif guess_age > age_of_oldboy:
        print("think small..")
    else:
        print("think bigger")

else:
    print("fock you")

• break  跳出当前循环，结束这个循环

for i in range(10):
    print("----------------",i)
    for j in range(10):
        if j >4:
            break
        print(j)

• continue：跳出本次继续，继续下一次循环

for i in range(10):
    if i<3:
        print("loop:",i)
    else:
        continue
    print("hahahha")

•  好