message = """欢迎致电10086
            1.话费查询；
            2.流量服务；
            3.业务办理；
            4.人工服务 
        """
print(message)
index = input(‘请输入你要选择的服务:‘)
index = int(index)
if index==1:
    print(‘话费查询‘)
elif index == 2:
    print(‘流量服务‘)
elif index == 3:
    content = """业务办理
                1. 修改密码；
                2. 更改套餐；
                3. 停机；
            """
    print(content)
    value = input(‘请输入要办理的业务：‘)
    value = int(value)
    if value == 1:
        print(‘修改密码‘)
    elif value == 2:
        print(‘更改套餐‘)
    elif value == 3:
        print(‘停机‘)
    else:
        print(‘错误‘)
elif index == 4:
    print(‘人工服务‘)
else:
    print(‘输入错误‘)

while True: 
    print(‘人生苦短，我用Python。‘)

while 1>0 and 2>1:
    print(‘人生苦短，我用Python。‘)

"""
count = 1
value = count + 1
print(value)
"""
"""
count = 1
count = count + 1
print(count)
"""

"""
count = 1
while True:
    print(count)
    count = count + 1
"""
# 练习
"""
while True:
    count = 1
    print(count)
    count = count + 1
"""
?

count = 1
while count <= 10:
    print(count)
    count = count + 1
print(‘结束‘)

"""
# 错误示例
count = 1
while count <= 10 and count != 7 :
    print(count)
    count = count + 1
"""
"""
# 正确
count = 1
while count <= 6:
    print(count)
    count = count + 1
count = 8
while count <= 10:
    print(count)
    count = count + 1
"""
"""
# 正确
count = 1
while count <= 10:
    if count != 7:
    print(count)
    count = count + 1
"""
"""
# 正确
count = 1
while count <= 10:
if count == 7:
    pass
else:
    print(count)
    count = count + 1
"""

while True:
    print(666)
    break # 终止当前循环
print(‘结束‘)
# 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‘)
"""
"""
# break是终止当前循环
while True:
    print(‘你好‘)
    while True:
        print(666)
        break
    break
"""
?

"""
count = 1
while count <=10:
    print(count)
    continue # 本次循环如果遇到continue，则不在继续往下走，而是回到while条件位置。
    count = count + 1
"""
# 示例：1234568910
count = 1
while count <=10:
    if count == 7:
        count = count + 1
        continue
    print(count)
    count = count + 1
?

"""
count = 1
while count < 10:
    print(count)
    count = count + 1
else: # 不再满足while后的条件时，触发。 或 条件=False
    print(‘ELSE代码块‘)
    print(‘结束‘)
"""
"""
count = 1
while True:
    print(count)
    if count == 10:
        break
    count = count + 1
else: # 不再满足while后的条件时，触发。 或 条件=False
    print(‘ELSE代码块‘)
    print(‘结束‘)
"""

# 字符串格式化存在的意义
name = input(‘姓名：‘)
do = input(‘在干什么：‘)
template = "%s在教室，%s。" %(name,do,)
print(template)
# 直接做占位符
# template = "我是%s，年龄%s, 职业%s。" %("alex",73,‘讲鸡汤‘,)
# print(template)

# template = "我是%s，年龄%d, 职业%s。" %("alex",73,‘讲鸡汤‘,)
# print(template)

# name = ‘alex‘
# template = "%s现在手机的电量是100%%" %(name,)
# print(template)

name = input(‘请输入姓名:‘)
age = input(‘请输入年龄:‘)
job = input(‘请输入职业:‘)
hobby = input(‘请输入爱好:‘)
msg = ‘‘‘
------------ info of Alex Li ----------
Name : %s
Age : %s
job : %s
Hobbie: %s
------------- end ----------------‘‘‘
data = msg %(name,age,job,hobby,)
print(data)

# 练习题: 1 ~ 100 之间所有的数相加。
# total = 0
# count = 1
# while count <=100:
#       total = total + count
#       count = count + 1
# print(total)
# 练习题：打印 1 ~ 100 之间的奇数。
count = 1
while count <= 100:
    val = count % 2
    if val == 1:
        print(count)
    count = count + 1

# count = 1
# while count <=100:
#       print(count)
#       count +=1 # count = count + 1