while循环.格式化输出.运算符.编码初识.

一.
while 3>2: # 真实条件
print('好嗨哟')
print('你的骆驼')
print('在人间')

num = 1
while num<11:
print(num)
num = num+1 变量都是先执行等号右边的然后在执行等号左边的。
倒序
a = 5
while a:
print(a)
a = a-1
正序
a = 1
while a <= 5:
print(a)
a = a + 1

print(1)
while True:
print("痒")
print("鸡你太美")
print("卡路里")
print("好运来")
print("小三")
print("小白脸")
print("趁早")
print("过火")
print(2)

falg = True
while falg:
print(1)
print(2)

print(bool(0))
数字中非零的都是True

正序的示范
count = 1
while count <= 5:
print(count)
count = count + 1

倒序的示范
count = 5
while count:
print(count)
count = count - 1

正序打印从 25 - 57
count = 25
while count <= 57:
print(count)
count = count + 1

倒序打印从 57 - 25
count = 57
while count >= 25:
print(count)
count = count - 1

break
continue

while True:
print(123)
print(234)
break # 终止当前循环，break下方的代码不会进行执行
print(345)
print(1111)

while True:
print(123)
print(234)
print(345)

while True:
print(123)
print(234)
continue
continue 伪装成循环体中的最后一行代码(跳出当前循环继续下次循环)
continue 下面的代码不会执行
print(345)
print(1111)

while else

while True:
print(111)
break
else:
print(222)

while True:
print(111)
break
print(222)

二.

a = "------------- info -------------"
b = "name:"
c = "age:"
d = "job:"
e = "-------------- end -------------"
name = input("name")
age = input("age")
job = input("job")
print(a + " " + b + name + " " + c + age + " "+ d + job + " " +e)

s = """ ------------- info -------------
name:%s
age:%s
job:%s
-------------- end -------------
"""
name = input("name")
age = int(input("age"))
job = input("job")
print(s%(name,age,job))

num = input('学习进度：')
s11 = "大哥黑的学习进度为:%s %%"
print(s11%(num))

s = f"今天下雨了{input('>>>')}"
print(s)

s11 = "大哥黑的学习进度为:%s"
print(s11%("不错"))

s = f"{1}{2}{3}"
print(s)

三.

算数运算符

/ python2获取的值是整数，python3获取的是浮点数（小数2.5）
print(5/2)
//(整除-- 地板除)
print(5 // 2)
** 幂（次方）
print(3**2)
% 模 (取余)
print(5 % 2)

比较运算符

<
== (等于)
!= (不等于)

=
<=

赋值运算符

= 赋值
+= 自加
a = 10
a += 1 # a = a + 1
print(a)
-= 自减
*= 自乘
a = 10
a *= 2 # a = a * 2
print(a)
/=
//=
**=
%=

逻辑运算符

and (与/和)
or （或）
not （非）

print(3 and 4)
print(0 and 4)
print(0 and False)

and 都为真的时候取and后边的值
and 都为假的时候取and前面的值
and 一真一假取假的

print(3 and 5 and 9 and 0 and False)
print(5 and False and 9 and 0)
print(1 and 2 and 5 and 9 and 6)

print(1 or 0)
print(1 or 2)
print(0 or False)

or 都为真的时候取or前边的值
or 都为假的时候取or后面的值
or 一真一假取真的

print(1 or 9 or 4 or 0 or 9)
print(not False)

() > not > and > or
从左向右执行
print(9 and 1 or not False and 8 or 0 and 7 and False)

成员运算符
in 存在
not in 不存在

s = "alexdsb"
if "sb" not in s:
print(True)
else:
print(False)

四.

今 0101
天 0110
晚 0010
上 0001
去 1001
便 1000
利 0100
店 1111
00000101 00000110 0010000110011001