#数据录入，类型查看，强转
age = input("age:")   #输入数据
print(type(age))    #查看输入数据age变量类型，发现为字符串
age = int(input("age:"))  #把输入的age强转为整型

#格式化输出
info = '''           #多行字符串必须用多引号
---------- info of %s ----
Name:%s
Age:%d
Job:%s
Salary:%s
'''%(name,name,age,job,salary)
print(info)
info2 = '''         #法2
---------- info of {_name} ----
Name:{_name}
Age:{_age}
Job:{_job}
Salary:{_salary}
'''. format(_name=name,
            _age=age,
            _job=job,
            _salary=salary)
print(info2)

if _username == username and _password == password:   #if中用and，不用&
    print("Welcome user {name} login...".format(name=username))  #format格式
else:
    print("Invalid username or password!")

print('{名字}今天{动作}'.format(名字='陈某某',动作='拍视频'))  #format函数：通过关键字

#从count = 0↑开始打印，直到judge结束，最多打印0-9
count = 0
judge = 8
while count<10:
    print("count:",count)
    count = count + 1
    if count == judge:
        break

#猜数游戏，实现多次，以及用户选择是否继续
number = 49
Maximum = 2
count = 0
while count < Maximum:
    guess = int(input("Please input guess number:"))
    if guess == number:
        print("congratulations!")
        break    #猜对了就跳出计数循环
    elif guess > number:
        print("your guess number is too big")
    else:
        print("your guess number is too small")
    count += 1
    #给用户继续进行的选择
    if count == Maximum:
        affirm = input("Do you want to continue? (Y/N)")    #要习惯提示语句直接放进input里面
        if affirm != 'N':
            count = 0      #经典，想继续，直接重置计数器
#由于上面加了继续进行，因此下面多余
else:
    print("You have tried too many times")  #while-else：如果循环正常进行，就会执行else语句

#计算1+3+5+……+98
sum = 0
for i in range(1,98,2):
    sum += i
print(sum)