第一个PYTHON程序——入派仪式！
作为经典的语言学习起手式，你绝不能错过这样的一个小程序。
print("Hello World!")
写下你的第一行PYTHON代码，执行后给你的回答。
Hello World!
你已经入坑了！
变量——给你个简单的定义
变量是为了存储信息，在程序中被调用，标识数据名称或类型。
变量定义的规则：
变量名只能是字母，数字或下划线的任意组合
变量名的第一个字符不能是数字
关键字不能生命为变量
为了方便读取等，变量命名一般都遵循变量本身的意义，如名字命名为name，年龄为age等等。
name = "Laay" #字符串类型string
age = "21" #int类型
province = "shandong"
NameOfTwinsGf = "hanmeimei"
name_of_twins_gf = "hanmeimei"
address = “shanghai”
address1 = address
address = “beijing” #address1 赋的是值，而不是变量，所以不变
注释
# 最多不超过80个字符
’‘’ ‘’‘ 多行注释
格式化字符串
name = input("input your name:")
age =int( input("input your age:"))
job = input("input your job:")
print("name is :",name)
print("age is :",age)
print("job is :",job)
msg = '''
infomation of user %s:
-----------------------------
name: %s
age : %d
job : %s
-----------------------------
''' % (name,name,age,job)
print(msg)
if 判断
_username = ‘Laay’
_password = ‘Laay’
username = input('input your name :')
password = input('input your password:')
if _username == username and _password == password:
print('login..')
else:
print('username or password is correct...')
age = 22
guess_num = int(input('input your num:'))
if guess_num == age :
print('congratulations! you got it.')
elif guess_num >age:
print('think smaller!')
else:
print('think bigger!')
循环
age = 22
counter = 0
for i in range(10)
if counter<3:
guess_num = int(input('input your num:'))
if guess_num == age :
print('congratulations! you got it.')
break
elif guess_num >age:
print('think smaller!')
else:
print('think bigger!')
else:
continue_confirm = input('Do you want to contnue because you are stupid:')
if countinue_confirm == 'y'
counter = 0
ciontinue
else:
print('bye')
break
count + = 1
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