python while for循环，及if else 语句的使用

 

#     while 实现 

count = 0
while count < 5:
    age = int(input('guess age:'))
    if age == 18:
        print("guess Success")
        break
    elif age > 18:
        print("Guess bigger!")
    else:
        print("Guess smaller!")
    count += 1
else:
    print("Guess counts too many")

#     for 实现

count = 0
for i in range(3):
    age = int(input('guess age:'))
    if age == 18:
        print("guess Success")
        break
    elif age > 18:
        print("Guess bigger!")
    else:
        print("Guess smaller!")
    count += 1
else:
    print("Guess counts too many")

 

###  range 可以接受三个参数，

range(start, stop, step)   # 开始，结束，步长

break 跳出当前循环

continue 跳出当次循环继续执行