流程控制 while循环 运算符

具体知识戳这里

可变数据类型：在id不变的情况下，数据类型内部的元素(value)可以改变

如：列表，字典

不可变类型：value改变，id也跟的改变

如：数字、字符、布尔类型

运算符

#算数运算符
# x=10
# y=3
#
# print(x / y)   除
# print(x // y)  除取整数
#
# print(x % y) #取余

# print(y**3) 求y的三次方

#了解部分
#字符串+，*
#列表:+,*
# l1=[1,2,3]
# l2=[4,5]
#
# print(l1+l2)
# print(l1*3)  输出3个l1

#比较运算符
# num1=3
# num2=1

# print(num1 > num2)
# print(num1 < num2)
# print(num1 >= num2)
# print(num1 <= num2)
# print(num1 == num2)
# print(num1 != num2)

#==判断的是值
#is判断的是id
'''
>>> num1=1234567890123456789
>>> num2=1234567890123456789
>>>
>>>
>>> id(num1),type(num1),num1
(41798792, <class 'int'>, 1234567890123456789)
>>> id(num2),type(num2),num2
(41798832, <class 'int'>, 1234567890123456789)
>>>
>>>
>>> num1 == num2
True
>>> num1 is num2
False
'''

#其他类型的比较,注意：只能在同种类型之间进行比较(了解)
#字符串的比较是按照字符的位置依次比较
# s1='abc'
# s2='abC'
#
# print(s1 > s2)

# l1=['abc',2,'a','b']
# l2=['abd']
# print(l1 > l2)
# print(l2 > l1)

#赋值运算
# x=10
# # x=x+1
# x+=1
# print(x)
#
# x/=3 #x=x/3
# print(x)

# x=10
# x%=3 #x=x%3
# print(x)

#逻辑与and
# age=input('您芳龄几何>>: ')
# age=int(age)

# age=int(input('您芳龄几何>>: '))
# sex=input('您的性别是>>: ')
#
# print(age > 50 and sex == 'female')

#逻辑或or
# age=int(input('您芳龄几何>>: '))
# sex=input('您的性别是>>: ')
#
# print(sex == 'female' or age > 50 )

# print(False and True or True)
# print((False and True) or True)
# print(False and (True or True))
# #
#
# print(False or False and True)
# print(False or (False and True))
# print(False or True and True)
#
#
print(False or True and False or True)
print(False or ((True and False) or True))
# print(1 > 10 or ( (2 > 1 and 1 < -1) or 4 > 3))
# print(False or True)

流程控制

# if 条件:
# 子代码1
# 子代码2
# 子代码3

# if True:
# print('ok')
# print('=====?>')
# print('=====?>')
# print('=====?>')
# print('=====?>')
# print('=====?>')

# age=int(input('您芳龄几何>>: '))
# sex=input('您的性别是>>: ')
#
# if sex == 'female' or age > 50:
# print('alex很中意你，我们结婚吧')
# else:
# print('不是我的菜')

# OLDBOY_AGE=56
# age=input('猜一猜年龄>>: ')
# age=int(age)
#
# if age > OLDBOY_AGE:
# print('太大了')
# elif age < OLDBOY_AGE:
# print('太小了')
# else:
# print('猜对了')

'''
90及以上 : A
80分以上90以下 : B
70分以上80以下 : C
60分以上70以下 : D
60以下 : E
'''
# score=input('>>:')
# score=int(score)
#
# if score >= 90:
# print('A')
# elif score >=80 and score <90:
# print('B')
# elif score >=70 and score <80:
# print('C')
# elif score >=60 and score < 70:
# print('D')
# else:
# print('E')

score=input('>>:')
score=int(score)

if score >= 90:
print('A')
elif score >=80:
print('B')
elif score >=70:
print('C')
elif score >=60:
print('D')
else:
print('E')

print('====>')

while循环

# while 条件:
# 循环体的代码1
# 循环体的代码2
# 循环体的代码3
# count=0
# while count < 10:
# print(count)
# count+=1

# while True: #死循环
# print('ok')

# while 1: #死循环
# print('ok')

#break:跳出本层循环
# count=0
# while count < 10:
# if count == 5:
# break
# print(count)
# count+=1

#continue：跳出本次循环
#0 1 2 3 7 8 9

# count=0
# while count < 10:
# if count >=4 and count <=6:
# count += 1
# continue
# print(count)
# count+=1

# OLDBOY_AGE=56
# while 1:
# age=input('猜一猜年龄>>: ')
# age=int(age)
#
# if age > OLDBOY_AGE:
# print('太大了')
# elif age < OLDBOY_AGE:
# print('太小了')
# else:
# print('猜对了')
# break

# OLDBOY_AGE=56
# count=1
# while count <= 3:
# age=input('猜一猜年龄>>: ')
# age=int(age)
#
# if age > OLDBOY_AGE:
# print('太大了')
# count+=1
# elif age < OLDBOY_AGE:
# print('太小了')
# count+=1
# else:
# print('猜对了')
# break

OLDBOY_AGE=56
count=1
while True:
if count > 3:
print('您猜的次数超过限制')
break
age=input('猜一猜年龄>>: ')
age=int(age)

if age > OLDBOY_AGE:
print('太大了')
elif age < OLDBOY_AGE:
print('太小了')
else:
print('猜对了')
break
count += 1

# OLDBOY_AGE=56
# while True:
# score = input('>>:')
# score = int(score)
#
# if score >= 90:
# print('A')
# if score >= 80:
# print('B')
# if score >= 70:
# print('C')
# if score >= 60:
# print('D')
# if score < 60:
# print('E')

OLDBOY_AGE=56
count=0
while True:
if count > 2:
break
age=input('猜一猜年龄>>: ')
age=int(age)
if age > OLDBOY_AGE:
print('太大了')

if age < OLDBOY_AGE:
print('太小了')

if age == OLDBOY_AGE:
print('猜对了')
break
count += 1