while循环，for循环

age_of_oldboy = 56

count = 0
while count <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 smaller...")
    else:
        print("think bigger....")
    count +=1

 

优化后的代码：

age_of_oldboy = 56

count = 0
while count <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 smaller...")
    else:
        print("think bigger....")
    count +=1
else:
    print("you have tried too mant times...fuck off")

 

for循环的代码：

age_of_oldboy = 56

count = 0
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 smaller...")
    else:
        print("think bigger....")

else:
    print("you have tried too mant times...fuck off")

 

continue: 跳出本次循环,继续到下一次循环

break:结束整个循环

 

来源：https://www.cnblogs.com/Cohen/p/7348853.html