python学习2之基础&运算符

# -*- coding:utf-8 -*-
count = 1
while count <= 10:
    print(count)
    count = count + 1

# -*- coding:utf-8 -*-
#打印1 2 3 4 5 6 8 9 10 
#方法一  
# count = 1
# while count <= 10 :
#     if count < 7:
#         print(count)
#         count = count + 1
#     elif count >7:
#         print(count)
#         count = count + 1
#     else:
#         count = count + 1

#错误的方法   会导致只打印到6
count = 1
while count <= 10 and count !=7:
    print(count)
    count = count + 1
    
#上面的纠正
count = 1
while count <= 10 :
    if count !=7:
        print(count)
    count = count + 1
        
#或者
count = 1
while count <= 10 :
    if count ==7:
        pass
    else:
        print(count)
        count = count + 1

#练习  通过break 实现1~10
count = 1
while True:
    print(count)
    if count == 10:
        break
    count = count + 1
print("结束")

#字符串格式化
name = input("姓名：")#快速复制的方法：鼠标放到括号那里，然后ctrl+d
do = input("在做什么：")

template = "%s在教室,%s" %(name,do,)#do后面加,是为了表示结束
print(template)


%s----字符串
%d-----数据
%%-----%

#练习
name = input("姓名：")
age = input("年龄：")
job = input("职业：")
hobby = input("爱好：")
msg = ‘‘‘
--------info of Alex Lib----------
name :%s
age  :%s
job  :%s
hobby:%s
--------------end----------------‘‘‘
print(msg%(name,age,job,hobby))

#字符串转数字
v1 = ‘666‘
v2 = int(v1) + 1
print(v2)

#数字转bool
v3 = 0
v4 = bool(v3)
print(v4)

#字符串转bool
v5 = "alex"
v6 = bool(v5)#因为v5是字符串，只有空串才会是false
print(v6)
v7 = ""
v8 = bool(v7)
print(v8)

#bool转str int
v1 = False  #大写F才是python关键字
v2 = str(v1)
v3 = int(v1)
print(v2)
print(v3)

#对于or
value1 = 0 or 9
print(value1)

value2 = 1 or 9
print(value2)
#第一个值如果是转换为布尔值如果是真，则value=第一个值
#第一个值如果是转换为布尔值如果是假，则value=第二个值

value3 = 0 or ""
print("---->",value3,"<----")

value4 = 0 or 9 or 8   #遇到or多的时候，一个一个来，从左到右，从前到后  因为 0 or 9 值为9
print(value4)          #所以相当于求 9 or 8 所以值为9

#对于and
#如果第一个值转换为bool值为True，则value=后面的值
#如果第一个值转换为bool值为False，则value=第一个值
#如果遇到多个and ，从前往后，从左到右，依次进行
v1 =1 and 0
v2 = 1 and 9
v3 = 0 and 7
v4 = 0 and ""
v5 = 1 and 0 and 9
v6 = 1 and ""
v7 = "" and 1
v8 = "" and 0
v9 = 1 and 9 or 0 and 6  #没有括号时先算and 再算or（面试时，一般没有括号
print(v1)
print(v2)
print(v3)
print(v4)
print(v5)
print("---->",v6,"<----")
print("---->",v7,"<----")
print("---->",v8,"<----")
print(v9)

#打印1~100的奇数
count = 1
while count <= 100:
    if count%2 == 1:
        print(count)
    else:
        pass
    count = count + 1

val = 2**8
print(val)
 #输出为256


val = 9/2
print(val)
#输出为4.5

val = 9//2
print(val)
#输出为4

#1~100所有数的和
count = 1
sum = 0
while count <= 100:
    sum += count
    count = count + 1
print(sum)

#输出为5050

1B=8b

2**10=1KB

2**10KB=1MB

2**10MB=1GB

2**10GB=1TB

2**10TB=1PB

2**10PB=1EB

2**10EB=1ZB

2**10ZB=1YB

2**10YB=1NB

2**10NB=1DB

git config --global user.email "you@example.com"
  git config --global user.name "Your Name"

git remote add origin https://gitee.com/NingNingD_520/demo.git