python全栈（二）条件语句和基本数据类型

字符串的搭配

 

'' " "  """   """

 

if条件语句

if 1 == 1:
    print("欢迎进入一教室")
    print("欢迎进入二教室")
else:
    print("罚站")

if 1 == 1:
    if 2 == 2:
        print("欢迎进入一教室")
        print("欢迎进入二教室")
    else:
        print("罚站")

inp = input ("请输入会员级别:")

if inp == "高级会员":
    print("720p高清")
elif inp == "白金会员":
    print("1080p高清")
elif inp == "铂金会员":
    print("蓝光")
else:
    print("城管")

字符串只有加法和乘法

n1 = "alex"
n2 = "sb"
n4 = "db"
n3 = n1 + n2 + n4
print(n3)

n1 = "alex"
n2 = "sb"
n4 = "db"
n3 = n1 * 10
print(n3)

数字加减乘法等

n1 = 9
n2 = 2
n3 = n1 + n2
print(n3)

n1 = 9
n2 = 2
n3 = n1 - n2
print(n3)

n1 = 9
n2 = 2
n3= n1 * n2
print(n3)

n1 = 9
n2 = 2
n3 = n1 / n2
print(n3)

n1 = 9
n2 = 2
n3 = n1 % n2
print(n3)

while循环
死循环

import time
while 1 ))== 1:
    print("ok",time.time())

 

import time
count = 0
while count < 10:
    print("ok",time.time())
    count = 100
print(123)

 

使用while循环输入1 2 3 4 5 6    8 9 10

 一

n = 1
while n < 11:
    if n == 7:
        pass
    else:
        print(n)
    n = n + 1
print("----end----")

二

n = 1
while n < 11:
    if n == 7:
        pass
    else:
        print(n)
    n = n + 1

输出1-100内的所有奇数
一

n = 1
while n < 101:
     temp = n % 2
     if temp == 0:
         pass
     else:
         print(n)
     n = n + 1
     print("----end----")
二

n = 1
while n < 101:
     temp = n % 2
     if temp == 0:
         pass
     else:
         print(n)
     n = n + 1

求1-100所有数的和

n = 1
s = 0
while n < 101:
    s = s + n
    n = n + 1
print(s)

求1-2+3-4+5....99所有数的和

n = 1
s = 0
while n < 100:
    temp = n % 2
    if temp == 0:
        s = s - n
    else:
        s = s + n
    n = n + 1
print(s)